Changeset 240 for palm/trunk/DOC/app
- Timestamp:
- Feb 18, 2009 5:50:38 PM (16 years ago)
- Location:
- palm/trunk/DOC/app
- Files:
-
- 3 edited
Legend:
- Unmodified
- Added
- Removed
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palm/trunk/DOC/app/chapter_4.1.html
r217 r240 2811 2811 </tr> 2812 2812 2813 <tr> 2813 <tr><td style="font-weight: bold; vertical-align: top;"><a name="canyon_height"></a>canyon_height</td><td style="vertical-align: top;">R</td><td style="font-style: italic; vertical-align: top;">50.0</td><td>Street canyon height 2814 in m.<br> 2815 2816 2817 2818 2819 2820 2821 <br> 2822 2823 2824 2825 2826 2827 2828 <span style="font-weight: bold;">canyon_height</span> must 2829 be less than the height of the model domain. This parameter requires <a href="chapter_4.1.html#topography">topography</a> 2830 = <span style="font-style: italic;">'single_street_canyon'</span>.</td></tr><tr><td style="font-weight: bold; vertical-align: top;"><a name="canyon_width_x"></a>canyon_width_x</td><td style="vertical-align: top;">R</td><td style="font-style: italic; vertical-align: top;">9999999.9</td><td>Street canyon width in x-direction in m.<br> 2831 2832 2833 2834 2835 2836 2837 <br> 2838 2839 2840 2841 2842 2843 2844 2845 Currently, <span style="font-weight: bold;">canyon_width_x</span> 2846 must be at least <span style="font-style: italic;">3 2847 * </span><a style="font-style: italic;" href="chapter_4.1.html#dx">dx</a> and no more than <span style="font-style: italic;">( </span><a style="font-style: italic;" href="chapter_4.1.html#nx">nx</a><span style="font-style: italic;"> - 1 ) </span><span style="font-style: italic;"> * <a href="chapter_4.1.html#dx">dx</a> 2848 </span><span style="font-style: italic;">- <a href="chapter_4.1.html#canyon_wall_left">canyon_wall_left</a></span>. 2849 This parameter requires <a href="chapter_4.1.html#topography">topography</a> 2850 = <span style="font-style: italic;">'</span><span style="font-style: italic;">single_street_canyon</span><span style="font-style: italic;">'</span>. A non-default value implies a canyon orientation in y-direction.</td></tr><tr><td style="font-weight: bold; vertical-align: top;"><a name="canyon_width_y"></a>canyon_width_y</td><td style="vertical-align: top;">R</td><td style="font-style: italic; vertical-align: top;">9999999.9</td><td>Street canyon width in y-direction in m.<br> 2851 2852 2853 2854 2855 2856 2857 <br> 2858 2859 2860 2861 2862 2863 2864 2865 Currently, <span style="font-weight: bold;">canyon_width_y</span> 2866 must be at least <span style="font-style: italic;">3 2867 * </span><a style="font-style: italic;" href="chapter_4.1.html#dy">dy</a> and no more than <span style="font-style: italic;">( </span><a style="font-style: italic;" href="chapter_4.1.html#ny">ny</a><span style="font-style: italic;"> - 1 ) </span><span style="font-style: italic;"> * <a href="chapter_4.1.html#dy">dy</a></span><span style="font-style: italic;"> - <a href="chapter_4.1.html#canyon_wall_south">canyon_wall_south</a></span>. This parameter requires <a href="chapter_4.1.html#topography">topography</a> 2868 = <span style="font-style: italic;">'</span><span style="font-style: italic;">single_street_canyon</span>. A non-default value implies a canyon orientation in x-direction.</td></tr><tr><td style="font-weight: bold; vertical-align: top;"><a name="canyon_wall_left"></a>canyon_wall_left</td><td style="vertical-align: top;">R</td><td style="font-style: italic; vertical-align: top;"><span style="font-style: italic;">canyon centered in x-direction</span></td><td>x-coordinate of the left canyon wall (distance between the 2869 left canyon wall and the left border of the model domain) in m.<br> 2870 2871 2872 2873 2874 2875 2876 2877 <br> 2878 2879 2880 2881 2882 2883 2884 2885 Currently, <span style="font-weight: bold;">canyon_wall_left</span> 2886 must be at least <span style="font-style: italic;">1 2887 * </span><a style="font-style: italic;" href="chapter_4.1.html#dx">dx</a> and less than <span style="font-style: italic;">( <a href="chapter_4.1.html#nx">nx</a> 2888 - 1 ) * <a href="chapter_4.1.html#dx">dx</a> - <a href="chapter_4.1.html#canyon_width_x">canyon_width_x</a></span>. 2889 This parameter requires <a href="chapter_4.1.html#topography">topography</a> 2890 = <span style="font-style: italic;">'</span><span style="font-style: italic;">single_street_canyon</span><span style="font-style: italic;">'</span>.<br> 2891 2892 2893 2894 2895 2896 2897 2898 <br> 2899 2900 2901 2902 2903 2904 2905 2906 The default value <span style="font-weight: bold;">canyon_wall_left</span> 2907 = <span style="font-style: italic;">( ( <a href="chapter_4.1.html#nx">nx</a> + 2908 1 ) * <a href="chapter_4.1.html#dx">dx</a> - <a href="chapter_4.1.html#canyon_width_x">canyon_width_x</a> ) / 2</span> 2909 centers the canyon in x-direction.</td></tr><tr><td style="font-weight: bold; vertical-align: top;"><a name="canyon_wall_south"></a>canyon_wall_south</td><td style="vertical-align: top;">R</td><td style="font-style: italic; vertical-align: top;"><span style="font-style: italic;">canyon centered in y-direction</span></td><td>y-coordinate of the South canyon wall (distance between the 2910 South canyon wall and the South border of the model domain) in m.<br> 2911 2912 2913 2914 2915 2916 2917 2918 <br> 2919 2920 2921 2922 2923 2924 2925 2926 Currently, <span style="font-weight: bold;">canyon_wall_south</span> 2927 must be at least <span style="font-style: italic;">1 2928 * </span><a style="font-style: italic;" href="chapter_4.1.html#dy">dy</a> and less than <span style="font-style: italic;">( <a href="chapter_4.1.html#ny">ny</a> 2929 - 1 ) * <a href="chapter_4.1.html#dy">dy</a> - <a href="chapter_4.1.html#canyon_width_y">canyon_width_y</a></span>. 2930 This parameter requires <a href="chapter_4.1.html#topography">topography</a> 2931 = <span style="font-style: italic;">'</span><span style="font-style: italic;">single_street_canyon</span><span style="font-style: italic;">'</span>.<br> 2932 2933 2934 2935 2936 2937 2938 2939 <br> 2940 2941 2942 2943 2944 2945 2946 2947 The default value <span style="font-weight: bold;">canyon_wall_south</span> 2948 = <span style="font-style: italic;">( ( <a href="chapter_4.1.html#ny">ny</a> + 2949 1 ) * <a href="chapter_4.1.html#dy">dy</a> - </span><a href="chapter_4.1.html#building_length_y"><span style="font-style: italic;"></span></a><a style="font-style: italic;" href="chapter_4.1.html#canyon_width_y">canyon_wid</a><span style="font-style: italic;"><a style="font-style: italic;" href="chapter_4.1.html#canyon_width_y">th_y</a> ) / 2</span> 2950 centers the canyon in y-direction.</td></tr><tr> 2814 2951 2815 2952 … … 3118 3255 3119 3256 <span style="font-weight: bold;">conserve_volume_flow</span> 3120 = <span style="font-style: italic;">.T RUE.</span>3257 = <span style="font-style: italic;">.T.</span> 3121 3258 guarantees that the volume flow through the xz- or yz-cross-section of 3122 3259 the total model domain remains constant (equal to the initial value at 3123 t=0) throughout the run.<br> 3260 t=0) throughout the run.<br><br>Note that <span style="font-weight: bold;">conserve_volume_flow</span> 3261 = <span style="font-style: italic;">.T.</span> requires <a href="#dp_external">dp_external</a> = <span style="font-style: italic;">.F.</span> .<br> 3124 3262 3125 3263 … … 3519 3657 3520 3658 </tr> 3521 3659 <tr><td style="vertical-align: top;"><p><a name="dp_external"></a><b>dp_external</b></p></td><td style="vertical-align: top;">L</td><td style="vertical-align: top; font-style: italic;">.F.</td><td>External pressure gradient switch.<br><br>This 3660 parameter is used to switch on/off an external pressure gradient as 3661 driving force. The external pressure gradient is controlled by the 3662 parameters <a href="#dp_smooth">dp_smooth</a>, <a href="#dp_level_b">dp_level_b</a> and <a href="#dpdxy">dpdxy</a>.<br><br>Note that <span style="font-weight: bold;">dp_external</span> = <span style="font-style: italic;">.T.</span> requires <a href="#conserve_volume_flow">conserve_volume_flow</a> =<span style="font-style: italic;"> .F. </span>It is normally recommended to disable the Coriolis force by setting <a href="l#omega">omega</a> = 0.0.</td></tr><tr><td style="vertical-align: top;"><p><a name="dp_smooth"></a><b>dp_smooth</b></p></td><td style="vertical-align: top;">L</td><td style="vertical-align: top; font-style: italic;">.F.</td><td>Vertically smooth the external pressure gradient using a sinusoidal smoothing function.<br><br>This parameter only applies if <a href="#dp_external">dp_external</a> = <span style="font-style: italic;">.T. </span>. It is useful in combination with <a href="#dp_level_b">dp_level_b</a> >> 0 to generate a non-accelerated boundary layer well below <a href="#dp_level_b">dp_level_b</a>.</td></tr><tr><td style="vertical-align: top;"><p><a name="dp_level_b"></a><b>dp_level_b</b></p></td><td style="vertical-align: top;">R</td><td style="vertical-align: top; font-style: italic;">0.0</td><td><font size="3">Lower 3663 limit of the vertical range for which the external pressure gradient is applied (</font>in <font size="3">m).</font><br><br>This parameter only applies if <a href="#dp_external">dp_external</a> = <span style="font-style: italic;">.T. </span><span lang="en-GB">It 3664 must hold the condition zu(0) <= <b>dp_level_b</b> 3665 <= zu(</span><a href="#nz"><span lang="en-GB">nz</span></a><span lang="en-GB">)</span><span lang="en-GB">. </span>It can be used in combination with <a href="#dp_smooth">dp_smooth</a> = <span style="font-style: italic;">.T.</span> to generate a non-accelerated boundary layer well below <span style="font-weight: bold;">dp_level_b</span> if <span style="font-weight: bold;">dp_level_b</span> >> 0.<br><br>Note 3666 that there is no upper limit of the vertical range because the external 3667 pressure gradient is always applied up to the top of the model domain.</td></tr><tr><td style="vertical-align: top;"><p><a name="dpdxy"></a><b>dpdxy</b></p></td><td style="vertical-align: top;">R(2)</td><td style="font-style: italic; vertical-align: top;">2 * 0.0</td><td>Values of the external pressure gradient applied in x- and y-direction, respectively (in Pa/m).<br><br>This parameter only applies if <a href="#dp_external">dp_external</a> = <span style="font-style: italic;">.T. </span>It sets the pressure gradient values. Negative values mean an acceleration, positive values mean deceleration. For example, <span style="font-weight: bold;">dpdxy</span> = -0.0002, 0.0, drives the flow in positive x-direction, <span lang="en-GB"></span></td></tr> 3522 3668 3523 3669 … … 13985 14131 13986 14132 13987 The building size and location can be specified withthe parameters <a href="#building_height">building_height</a>, <a href="#building_length_x">building_length_x</a>, <a href="#building_length_y">building_length_y</a>, <a href="#building_wall_left">building_wall_left</a> and <a href="#building_wall_south">building_wall_south</a>.<font color="#000000"><br></font></div>14133 The building size and location can be specified by the parameters <a href="#building_height">building_height</a>, <a href="#building_length_x">building_length_x</a>, <a href="#building_length_y">building_length_y</a>, <a href="#building_wall_left">building_wall_left</a> and <a href="#building_wall_south">building_wall_south</a>.<font color="#000000"><br></font></div> 13988 14134 13989 14135 … … 14000 14146 14001 14147 14002 <p><span style="font-style: italic;">'read_from_file'</span><br> 14148 <p><span style="font-style: italic;">'single_street_canyon'</span><br> 14149 14150 14151 14152 14153 14154 14155 14156 </p> 14157 14158 14159 14160 14161 14162 14163 14164 14165 14166 14167 14168 14169 14170 <div style="margin-left: 40px;">Flow 14171 over a single, quasi-2D street canyon of infinite length oriented either in x- or in y-direction.<br> 14172 14173 14174 14175 14176 14177 14178 14179 The canyon size, orientation and location can be specified by the parameters <a href="chapter_4.1.html#canyon_height">canyon_height</a> plus <span style="font-weight: bold;">either</span> <a href="chapter_4.1.html#canyon_width_x">canyon_width_x</a> and <a href="chapter_4.1.html#canyon_wall_left">canyon_wall_left</a> <span style="font-weight: bold;">or</span> <a href="chapter_4.1.html#canyon_width_y">canyon_width_y</a> and <a href="chapter_4.1.html#canyon_wall_south">canyon_wall_south</a>.<font color="#000000"><br></font></div> 14180 14181 14182 14183 14184 14185 14186 14187 <span style="font-style: italic;"></span> <span style="font-style: italic;"></span><p><span style="font-style: italic;">'read_from_file'</span><br> 14003 14188 14004 14189 -
palm/trunk/DOC/app/chapter_4.2.html
r237 r240 3398 3398 3399 3399 3400 <td style="vertical-align: top; ">3400 <td style="vertical-align: top; font-family: Helvetica,Arial,sans-serif;"> 3401 3401 3402 3402 … … 3411 3411 3412 3412 3413 <p><span lang="en-GB"> <font face="Thorndale, serif">The parameter </font></span><a href="#create_disturbances"><span lang="en-GB"><font face="Thorndale, serif">create_disturbances</font></span></a><font face="Thorndale, serif"><span lang="en-GB">3413 <p><span lang="en-GB">The parameter </span><a href="#create_disturbances"><span lang="en-GB">create_disturbances</span></a><span lang="en-GB"> 3414 3414 describes how to impose 3415 3415 random perturbations to the horizontal velocity field. The perturbation … … 3420 3420 velocities are imposed no more. The value of this parameter usually 3421 3421 must be determined by trial and error (it depends e.g. on the total 3422 number of grid points).</span> </font></p>3422 number of grid points).</span> </p> 3423 3423 3424 3424 … … 3457 3457 3458 3458 3459 <td style="vertical-align: top; ">3460 3461 3462 <p lang="en-GB"><font face="Thorndale, serif"><fontsize="3">Lower3459 <td style="vertical-align: top; font-family: Helvetica,Arial,sans-serif;"> 3460 3461 3462 <p lang="en-GB"><font size="3">Lower 3463 3463 limit of the vertical range for which random perturbations are to be 3464 imposed on the horizontal wind field (</font> </font>in <font face="Thorndale, serif"><font size="3">m). 3465 </font> </font></p>3466 3467 3468 3469 3470 3471 <p><span lang="en-GB"> <font face="Thorndale, serif">This3464 imposed on the horizontal wind field (</font>in <font size="3">m). 3465 </font> </p> 3466 3467 3468 3469 3470 3471 <p><span lang="en-GB">This 3472 3472 parameter must hold the condition zu(3) <= <b>disturbance_level_b</b> 3473 <= zu(</ font></span><a href="chapter_4.1.html#nz"><span lang="en-GB"><font face="Thorndale, serif">nz-2</font></span></a><span lang="en-GB"><font face="Thorndale, serif">)</font></span><span lang="en-GB"><font face="Thorndale, serif">. Additionally, <b>disturbance_level_b</b>3474 <= </ font></span><a href="#disturbance_level_t"><span lang="en-GB"><font face="Thorndale, serif">disturbance_level_t</font></span></a>3475 <span lang="en-GB"> <font face="Thorndale, serif">must3476 also hold.</ font></span></p>3477 3478 3479 3480 3481 <p><span lang="en-GB"> <font face="Thorndale, serif">In case of ocean runs (see <a href="chapter_4.1.html#ocean">ocean</a>) </font></span><span lang="en-GB"><span style="font-family: Thorndale,serif;">the default value is <span style="font-weight: bold;">disturbance_level_b</span> = <span style="font-style: italic;">zu(nz * 2 / 3) </span>(negative).</span></span><a href="chapter_4.1.html#nz"><span lang="en-GB"></span></a><span lang="en-GB"></span><span lang="en-GB"></span></p>3482 3483 3484 3485 3486 3487 <p><span lang="en-GB"> <font face="Thorndale, serif">The3488 parameter </ font></span><a href="#create_disturbances"><span lang="en-GB"><font face="Thorndale, serif">create_disturbances</font></span></a><font face="Thorndale, serif"><span lang="en-GB">3473 <= zu(</span><a href="chapter_4.1.html#nz"><span lang="en-GB">nz-2</span></a><span lang="en-GB">)</span><span lang="en-GB">. Additionally, <b>disturbance_level_b</b> 3474 <= </span><a href="#disturbance_level_t"><span lang="en-GB">disturbance_level_t</span></a> 3475 <span lang="en-GB">must 3476 also hold.</span></p> 3477 3478 3479 3480 3481 <p><span lang="en-GB">In case of ocean runs (see <a href="chapter_4.1.html#ocean">ocean</a>) </span><span lang="en-GB">the default value is <span style="font-weight: bold;">disturbance_level_b</span> = <span style="font-style: italic;">zu(nz * 2 / 3) </span>(negative).</span><a href="chapter_4.1.html#nz"><span lang="en-GB"></span></a><span lang="en-GB"></span><span lang="en-GB"></span></p> 3482 3483 3484 3485 3486 3487 <p><span lang="en-GB">The 3488 parameter </span><a href="#create_disturbances"><span lang="en-GB">create_disturbances</span></a><span lang="en-GB"> 3489 3489 describes how to impose 3490 random perturbations to the horizontal velocity field</span></font><font face="Thorndale, serif"><span lang="en-GB">.</span> 3490 random perturbations to the horizontal velocity field</span><span lang="en-GB">.</span> 3491 </p> 3492 3493 3494 </td> 3495 3496 3497 </tr> 3498 3499 3500 <tr> 3501 3502 3503 <td style="vertical-align: top;"> 3504 3505 3506 <p><a name="disturbance_level_t"></a><b>disturbance_level_t</b></p> 3507 3508 3509 3510 </td> 3511 3512 3513 <td style="vertical-align: top;">R</td> 3514 3515 3516 3517 <td style="vertical-align: top;"><i>zu(nz/3) or<br> 3518 3519 3520 zu(nzt-3)<br> 3521 3522 3523 see right</i></td> 3524 3525 3526 3527 <td style="vertical-align: top; font-family: Helvetica,Arial,sans-serif;"> 3528 3529 3530 <p lang="en-GB"><font size="3">Upper 3531 limit of the vertical range for which random perturbations are to be 3532 imposed on the horizontal wind field (</font>in <font size="3">m). 3491 3533 </font> </p> 3492 3534 3493 3535 3536 3537 3538 3539 <p><span lang="en-GB">This 3540 parameter must hold the condition <b>disturbance_level_t</b> 3541 <= zu<i>(</i></span><i><a href="chapter_4.1.html#nz"><span lang="en-GB">nz-2</span></a><span lang="en-GB">)</span></i><span lang="en-GB">. 3542 Additionally, </span><a href="#disturbance_level_b"><span lang="en-GB">disturbance_level_b</span></a> 3543 <span lang="en-GB"><= 3544 <b>disturbance_level_t</b> 3545 must also hold.</span></p> 3546 3547 3548 <span lang="en-GB">In case of ocean runs (see <a href="chapter_4.1.html#ocean">ocean</a>) </span><span lang="en-GB">the default value is <span style="font-weight: bold;">disturbance_level_t</span> = <span style="font-style: italic;">zu(nzt - 3</span>)</span><span lang="en-GB"><span style="font-style: italic;"> </span>(negative)</span><span lang="en-GB">.</span> 3549 3550 3551 <p><span lang="en-GB">The 3552 parameter </span><a href="#create_disturbances"><span lang="en-GB">create_disturbances</span></a><span lang="en-GB"> 3553 describes how to impose 3554 random perturbations to the horizontal velocity field</span><span lang="en-GB">.</span> 3555 </p> 3556 3557 3494 3558 </td> 3495 3559 … … 3504 3568 3505 3569 3506 <p><a name="disturbance_level_t"></a><b>disturbance_level_t</b></p>3507 3508 3509 3510 </td>3511 3512 3513 <td style="vertical-align: top;">R</td>3514 3515 3516 3517 <td style="vertical-align: top;"><i>zu(nz/3) or<br>3518 3519 3520 zu(nzt-3)<br>3521 3522 3523 see right</i></td>3524 3525 3526 3527 <td style="vertical-align: top;">3528 3529 3530 <p lang="en-GB"><font face="Thorndale, serif"><font size="3">Upper3531 limit of the vertical range for which random perturbations are to be3532 imposed on the horizontal wind field (</font></font>in <font face="Thorndale, serif"><font size="3">m). 3533 </font></font> </p>3534 3535 3536 3537 3538 3539 <p><span lang="en-GB"><font face="Thorndale, serif">This3540 parameter must hold the condition <b>disturbance_level_t</b>3541 <= zu<i>(</i></font></span><i><a href="chapter_4.1.html#nz"><span lang="en-GB"><font face="Thorndale, serif">nz-2</font></span></a><span lang="en-GB"><font face="Thorndale, serif">)</font></span></i><span lang="en-GB"><font face="Thorndale, serif">.3542 Additionally, </font></span><a href="#disturbance_level_b"><span lang="en-GB"><font face="Thorndale, serif">disturbance_level_b</font></span></a>3543 <span lang="en-GB"><font face="Thorndale, serif"><=3544 <b>disturbance_level_t</b>3545 must also hold.</font></span></p>3546 3547 3548 <span lang="en-GB"><font face="Thorndale, serif">In case of ocean runs (see <a href="chapter_4.1.html#ocean">ocean</a>) </font></span><span lang="en-GB"><span style="font-family: Thorndale,serif;">the default value is <span style="font-weight: bold;">disturbance_level_t</span> = <span style="font-style: italic;">zu(nzt - 3</span>)</span></span><span lang="en-GB"><span style="font-family: Thorndale,serif;"><span style="font-style: italic;"> </span>(negative)</span></span><span lang="en-GB"><span style="font-family: Thorndale,serif;">.</span></span>3549 3550 3551 <p><span lang="en-GB"><font face="Thorndale, serif">The3552 parameter </font></span><a href="#create_disturbances"><span lang="en-GB"><font face="Thorndale, serif">create_disturbances</font></span></a><font face="Thorndale, serif"><span lang="en-GB">3553 describes how to impose3554 random perturbations to the horizontal velocity field</span></font><font face="Thorndale, serif"><span lang="en-GB">.</span>3555 </font> </p>3556 3557 3558 </td>3559 3560 3561 </tr>3562 3563 3564 <tr>3565 3566 3567 <td style="vertical-align: top;">3568 3569 3570 3570 <p><a name="do2d_at_begin"></a><b>do2d_at_begin</b></p> 3571 3571 … … 3582 3582 3583 3583 3584 <td style="vertical-align: top; ">.F.<br>3584 <td style="vertical-align: top; font-style: italic;">.F.<br> 3585 3585 3586 3586 … … 3637 3637 3638 3638 3639 <td style="vertical-align: top; ">.F.<br>3639 <td style="vertical-align: top; font-style: italic;">.F.<br> 3640 3640 3641 3641 … … 3685 3685 3686 3686 3687 <td style="vertical-align: top; ">.F.<br>3687 <td style="vertical-align: top; font-style: italic;">.F.<br> 3688 3688 3689 3689 … … 3762 3762 3763 3763 3764 <td style="vertical-align: top; ">see3764 <td style="vertical-align: top; font-style: italic;">see 3765 3765 right<br> 3766 3766 … … 3828 3828 3829 3829 3830 3830 <tr> 3831 3831 3832 3832 … … 3852 3852 3853 3853 3854 < p lang="en-GB"><fontface="Thorndale, serif"><font size="3">Time3855 step to be used by the 3d-model (</font></font> in <fontface="Thorndale, serif"><font size="3">s). 3856 </font></font> </p>3857 3858 3859 3860 3861 3862 <p ><span lang="en-GB"><font face="Thorndale, serif">This parameter</font></span>3863 < font face="Thorndale, serif"><span lang="en-GB">is3854 <font style="font-family: Helvetica,Arial,sans-serif;" face="Thorndale, serif"><font size="3">Time 3855 step to be used by the 3d-model (</font></font><span style="font-family: Helvetica,Arial,sans-serif;">in </span><font style="font-family: Helvetica,Arial,sans-serif;" face="Thorndale, serif"><font size="3">s). 3856 </font></font> 3857 3858 3859 3860 3861 3862 <p style="font-family: Helvetica,Arial,sans-serif;"><span lang="en-GB">This parameter</span> 3863 <span lang="en-GB">is 3864 3864 described in 3865 detail with the initialization parameters (see</span>< /font><span lang="en-GB"><font face="Thorndale, serif"> </font></span><a href="chapter_4.1.html#dt"><span lang="en-GB"><font face="Thorndale, serif">dt</font></span></a><font face="Thorndale, serif"><span lang="en-GB">).3865 detail with the initialization parameters (see</span><span lang="en-GB"> </span><a href="chapter_4.1.html#dt"><span lang="en-GB">dt</span></a><span lang="en-GB">). 3866 3866 Additionally, it may be 3867 3867 used as a run parameter and then applies to all restart runs (until it 3868 3868 is changed again). A switch from a constant time step to a variable 3869 time step can be achieved with <b>dt</b> = <i>-1.0</i>.</span> 3870 </font> </p>3869 time step can be achieved with <b>dt</b> = <i>-1.0</i>.</span></p><font face="Thorndale, serif"> 3870 </font> 3871 3871 3872 3872 … … 3917 3917 3918 3918 3919 <br >3920 3921 3922 <font face="Thorndale, serif"><span lang="en-GB">With3919 <br style="font-family: Helvetica,Arial,sans-serif;"> 3920 3921 3922 <font style="font-family: Helvetica,Arial,sans-serif;" face="Thorndale, serif"><span lang="en-GB">With 3923 3923 variable time step (see <span style="font-weight: bold;">dt</span>), 3924 3924 the number of time levels entering the average can vary from one 3925 averaging interval to the next (for a more detailed explanation see </span></font><font ><a href="#averaging_interval"><span lang="en-GB"><font face="Thorndale, serif">averaging_interval</font></span></a>)</font><fontface="Thorndale, serif"><span lang="en-GB">. It3925 averaging interval to the next (for a more detailed explanation see </span></font><font style="font-family: Helvetica,Arial,sans-serif;"><a href="#averaging_interval"><span lang="en-GB">averaging_interval</span></a>)</font><font style="font-family: Helvetica,Arial,sans-serif;" face="Thorndale, serif"><span lang="en-GB">. It 3926 3926 is approximately given by the quotient of <span style="font-weight: bold;">averaging_interval</span> / 3927 3927 MAX(<span style="font-weight: bold;"> dt_averaging_input</span>, 3928 3928 <span style="font-weight: bold;">dt</span>) (which 3929 3929 gives a more or less exact value if a fixed timestep is used and if 3930 this is an integral divisor of <span style="font-weight: bold;">dt_averaging_input</span>).</span></font> 3931 < br>3930 this is an integral divisor of <span style="font-weight: bold;">dt_averaging_input</span>).</span></font><span style="font-family: Helvetica,Arial,sans-serif;"> 3931 </span><br style="font-family: Helvetica,Arial,sans-serif;"> 3932 3932 3933 3933 -
palm/trunk/DOC/app/chapter_4.6.html
r237 r240 1830 1830 <td>Canopy mode</td> 1831 1831 </tr> 1832 <tr> 1832 <tr><td style="font-weight: bold;"><a href="chapter_4.1.html#canyon_height">canyon_height</a></td><td>I</td><td>R</td><td style="font-style: italic;">50.0</td><td>Street canyon height 1833 in m.</td></tr><tr><td style="font-weight: bold;"><a href="chapter_4.1.html#canyon_width_x">canyon_width_x</a></td><td>I</td><td>R</td><td style="font-style: italic;">9999999.9</td><td>Street canyon width in x-direction in m.</td></tr><tr><td style="font-weight: bold;"><a href="chapter_4.1.html#canyon_width_y">canyon_width_y</a></td><td>I</td><td>R</td><td style="font-style: italic;">9999999.9</td><td>Street canyon width in y-direction in m.</td></tr><tr><td style="font-weight: bold;"><a href="chapter_4.1.html#canyon_wall_left">canyon_wall_left</a></td><td>I</td><td>R</td><td style="font-style: italic;">canyon centered in x-direction</td><td>x-coordinate of the left canyon wall in m.</td></tr><tr><td style="font-weight: bold;"><a href="chapter_4.1.html#canyon_wall_south">canyon_wall_south</a></td><td>I</td><td>R</td><td style="font-style: italic;">canyon centered in y-direction</td><td>y-coordinate of the South canyon wall in m.</td></tr><tr> 1833 1834 1834 1835 … … 3471 3472 3472 3473 3473 <tr> 3474 <tr><td style="font-weight: bold;"><a href="chapter_4.1.html#dp_external">dp_external</a></td><td>R</td><td>L</td><td style="font-style: italic;">.F.</td><td>External pressure gradient switch.</td></tr><tr><td style="font-weight: bold;"><a href="chapter_4.1.html#dp_smooth">dp_smooth</a></td><td>R</td><td>L</td><td style="font-style: italic;">.F.</td><td>Vertically smooth the external pressure gradient using a sinusoidal smoothing function.</td></tr><tr><td style="font-weight: bold;"><a href="chapter_4.1.html#dp_level_b">dp_level_b</a></td><td>R</td><td>R</td><td style="font-style: italic;">0.0</td><td><font size="3">Lower 3475 limit of the vertical range for which the external pressure gradient is applied (</font>in <font size="3">m).</font></td></tr><tr><td style="font-weight: bold;"><a href="chapter_4.1.html#dpdxy">dpdxy</a></td><td>R</td><td>R (2)</td><td style="font-style: italic;">2 * 0.0</td><td>Values of the external pressure gradient applied in x- and y-direction, respectively (in Pa/m).<br></td></tr><tr> 3474 3476 <td><a href="chapter_4.1.html#drag_coefficient"><span style="font-weight: bold;">drag_coefficient</span></a></td> 3475 3477 <td>I</td>
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