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| 3 | <meta http-equiv="CONTENT-TYPE" content="text/html; charset=windows-1252"><title>PALM chapter 3.5.3</title> <meta name="GENERATOR" content="StarOffice 7 (Win32)"> <meta name="AUTHOR" content="Siegfried Raasch"> <meta name="CREATED" content="20040802;14001660"> <meta name="CHANGED" content="20041112;14483720"> <meta name="KEYWORDS" content="parallel LES model"> <style> |
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| 8 | <body style="direction: ltr;" lang="en-US"><h3 style="line-height: 100%;">3.5.3 Definition of user-defined |
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| 9 | subdomains</h3> |
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| 10 | <p style="line-height: 100%;">By default, the values of |
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| 11 | the timeseries quantities and the horizontally averaged vertical |
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| 12 | profiles (saved in local files |
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| 13 | <a href="chapter_3.4.html#PLOT1D_DATA">PLOT1D_DATA</a> |
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| 14 | and <a href="chapter_3.4.html#LIST_PROFIL">LIST_PROFIL</a>) |
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| 15 | always refer to the total model domain. Independently, up to 9 time |
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| 16 | series or profiles for different user-defined subdomains can be |
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| 17 | computed and plotted additionally. Steering in principle is done |
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| 18 | via the initialization parameter <a href="chapter_4.1.html#statistic_regions">statistic_regions</a>. |
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| 19 | </p> |
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| 20 | <p style="line-height: 100%;">The exact definition of |
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| 21 | these subdomains |
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| 22 | has to be made by the user within the user-defined subroutine |
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| 23 | <tt><font style="font-size: 10pt;" size="2">init_user</font></tt>. |
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| 24 | The |
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| 25 | subdomains are defined with a mask array named <tt><font style="font-size: 10pt;" size="2">rmask</font></tt>, |
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| 26 | which has to be given the value 1.0 for all horizontal grid points |
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| 27 | belonging to |
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| 28 | the user-defined subdomain and the value 0.0, where grid points do not |
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| 29 | belong |
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| 30 | to the user-defined subdomain. In the model <tt><font size="2">rmask</font></tt> |
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| 31 | is |
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| 32 | declared as: </p> |
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| 33 | <ul> <p style="line-height: 100%;"><tt><font style="font-size: 10pt;" size="2">REAL :: rmask |
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| 34 | (nys-1:nyn+1,nxl-1:nxr+1,0:9) .</font></tt></p> |
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| 35 | </ul><p style="line-height: 100%;">The first two |
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| 36 | indices are the grid point |
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| 37 | indices in y and x-direction. With parallel model runs <tt><font style="font-size: 10pt;" size="2">nxl</font></tt><font style="font-size: 10pt;" size="2">, |
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| 38 | </font><tt><font style="font-size: 10pt;" size="2">nxr</font></tt><font style="font-size: 10pt;" size="2">, |
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| 39 | </font><tt><font style="font-size: 10pt;" size="2">nys</font></tt><font style="font-size: 10pt;" size="2"> |
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| 40 | <font size="3">and</font> </font><tt><font style="font-size: 10pt;" size="2">nyn</font></tt> |
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| 41 | are the array bounds of the respective subdomain (don't confuse this |
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| 42 | with the user-defined subdomain!) on the |
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| 43 | respective processor. With runs on one processor <tt><font style="font-size: 10pt;" size="2">nys</font></tt><font style="font-size: 10pt;" size="2"> |
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| 44 | = </font><tt><font style="font-size: 10pt;" size="2">nxl</font></tt><font style="font-size: 10pt;" size="2"> |
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| 45 | = 0</font> and <font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace">nxr |
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| 46 | =</font> </font><a href="chapter_4.1.html#nx">nx</a> |
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| 47 | and <font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace">nyn |
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| 48 | =</font></font> <a href="chapter_4.1.html#ny">ny</a>. |
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| 49 | The third index determines the user-defined subdomain. The total model |
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| 50 | domain |
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| 51 | carries the index 0, the user-defined subdomains have the values 1 to |
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| 52 | 9. </p> |
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| 53 | <p style="line-height: 100%;">The following example should |
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| 54 | illustrate |
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| 55 | this. Two subdomains are defined by the user. The first is determined |
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| 56 | by all grid |
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| 57 | points which lie within a circle whose center is equal to the |
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| 58 | (horizontal) center of the model domain and whose diameter is equal |
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| 59 | to half of the total horizontal domain size (square total domain |
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| 60 | assumed). |
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| 61 | The second subdomain should be defined by all points outside of this |
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| 62 | domain. This may be obtained by the following lines of code in <tt><font style="font-size: 10pt;" size="2">user_init</font></tt>: |
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| 63 | </p> |
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| 64 | <ul> <p style="line-height: 100%;"><tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace">USE |
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| 65 | grid_variables</font></font></tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> <br> </font></font><tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace">USE indices</font></font></tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> <br> </font></font><tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace">USE statistics</font></font></tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> <br> </font></font><tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace">.</font></font></tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"><br> </font></font><tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace">.</font></font></tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"><br> </font></font><tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace">.</font></font></tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"><br> </font></font><tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace">disc_center_x = dx * (nx + 1)/2</font></font></tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> <br> </font></font><tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace">disc_center_y = dy * (ny + 1)/2</font></font></tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> <br> </font></font><tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace">disc_radius = 0.5 * |
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| 66 | disc_center_x</font></font></tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> <br> </font></font><tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace">DO i = nxl-1, nxr+1</font></font></tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> <br> </font></font><tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> x = i * dx</font></font></tt><br> |
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| 67 | <tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> |
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| 68 | DO j = nys-1, nyn+1</font></font></tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> <br> </font></font><tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> |
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| 69 | y = j * dy</font></font></tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"><br> </font></font><tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> |
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| 70 | radial_distance = SQRT( ( x - disc_center_x )**2 + &</font></font></tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> <br> </font></font><tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> |
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| 71 | ( y - disc_center_y )**2 )</font></font></tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> <br> </font></font><tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> |
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| 72 | IF ( radial_distance |
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| 73 | > disc_radius ) THEN</font></font></tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"><br> </font></font><tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> |
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| 74 | rmask(j,i,1) = 0.0</font></font></tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"><br> </font></font><tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> |
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| 75 | rmask(j,i,2) = 1.0</font></font></tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"><br> </font></font><tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> |
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| 76 | ELSE</font></font></tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"><br> </font></font><tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> |
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| 77 | rmask(j,i,1) = 1.0</font></font></tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"><br> </font></font><tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> |
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| 78 | rmask(j,i,2) = 0.0</font></font></tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"><br> </font></font><tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> |
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| 79 | ENDIF</font></font></tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> <br> </font></font><tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> ENDDO</font></font></tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"><br> </font></font><tt><font style="font-size: 10pt;" size="2"><font face="Cumberland, monospace">ENDDO</font></font></tt></p> |
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| 80 | </ul><p style="line-height: 100%;">The module <span style="font-family: monospace;">statistics</span> must |
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| 81 | be used, |
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| 82 | because it contains <span style="font-family: monospace;">rmask</span> |
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| 83 | and the modules <span style="font-family: monospace;">grid_variables</span> |
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| 84 | and <span style="font-family: monospace;">indices</span> |
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| 85 | are |
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| 86 | necessary in this example, because grid spacing and indices are used. |
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| 87 | All array elements of <span style="font-family: monospace;">rmask</span> |
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| 88 | (<span style="font-family: monospace;">rmask(:,:,:)</span>) |
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| 89 | are preset |
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| 90 | by the model with 1.0. In no case this assignment must be |
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| 91 | changed for the total domain (<span style="font-family: monospace;">rmask(:,:,0)</span>)! |
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| 92 | Computations and output for the user-defined subdomains only take place |
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| 93 | if |
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| 94 | the user sets <a href="chapter_4.1.html#statistic_regions">statistic_regions</a> |
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| 95 | ≥ <i>1</i>. Beyond that, names for the user-defined |
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| 96 | subdomains can be |
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| 97 | assigned |
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| 98 | via the initialization parameter <a href="chapter_4.3.html#region">region</a>. |
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| 99 | Output of the names of the selected user-defined subdomains happens in |
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| 100 | the local files <a href="chapter_3.4.html#HEADER">HEADER</a> |
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| 101 | and <a href="chapter_3.4.html#RUN_CONTROL">RUN_CONTROL</a> |
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| 102 | within the user-defined subroutine <tt><font style="font-size: 10pt;" size="2">user_header</font></tt>. |
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| 103 | <br> |
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| 104 | </p> |
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| 105 | <hr><p style="line-height: 100%;"><br> |
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| 106 | <font color="#000080"><font color="#000080"><a href="chapter_3.5.2.html"><font color="#000080"><img src="left.gif" name="Grafik1" align="bottom" border="2" height="32" width="32"></font></a><a href="index.html"><font color="#000080"><img src="up.gif" name="Grafik2" align="bottom" border="2" height="32" width="32"></font></a><a href="chapter_3.5.4.html"><font color="#000080"><img src="right.gif" name="Grafik3" align="bottom" border="2" height="32" width="32"></font></a></font></font></p><p style="line-height: 100%;"><i>Last change: </i> |
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| 107 | $Id: chapter_3.5.3.html 132 2007-11-20 09:46:11Z raasch $</p> |
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| 108 | </body></html> |
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