1 | SUBROUTINE init_pt_anomaly |
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2 | |
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3 | !------------------------------------------------------------------------------! |
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4 | ! Current revisions: |
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5 | ! ----------------- |
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6 | ! |
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7 | ! |
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8 | ! Former revisions: |
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9 | ! ----------------- |
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10 | ! $Id: init_pt_anomaly.f90 863 2012-03-26 14:28:17Z letzel $ |
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11 | ! |
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12 | ! 861 2012-03-26 14:18:34Z suehring |
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13 | ! Modification of the amplitude to obtain a visible temperature perturbation. |
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14 | ! |
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15 | ! 667 2010-12-23 12:06:00Z suehring/gryschka |
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16 | ! Call of exchange_horiz are modified. |
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17 | ! |
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18 | ! 75 2007-03-22 09:54:05Z raasch |
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19 | ! 2nd+3rd argument removed from exchange horiz |
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20 | ! |
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21 | ! 19 2007-02-23 04:53:48Z raasch |
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22 | ! Calculation extended for gridpoint nzt |
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23 | ! |
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24 | ! RCS Log replace by Id keyword, revision history cleaned up |
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25 | ! |
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26 | ! Revision 1.7 2005/03/26 20:36:55 raasch |
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27 | ! Arguments for non-cyclic boundary conditions added to argument list of |
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28 | ! routine exchange_horiz |
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29 | ! |
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30 | ! Revision 1.1 1997/08/29 08:58:56 raasch |
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31 | ! Initial revision |
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32 | ! |
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33 | ! |
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34 | ! Description: |
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35 | ! ------------ |
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36 | ! Impose a temperature perturbation for an advection test. |
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37 | !------------------------------------------------------------------------------! |
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38 | |
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39 | USE arrays_3d |
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40 | USE constants |
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41 | USE grid_variables |
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42 | USE indices |
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43 | USE control_parameters |
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44 | |
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45 | IMPLICIT NONE |
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46 | |
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47 | INTEGER :: i, ic, j, jc, k, kc |
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48 | REAL :: betrag, radius, rc, x, y, z |
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49 | |
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50 | ! |
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51 | !-- Defaults: radius rc, strength z, |
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52 | !-- position of centre: ic, jc, kc |
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53 | rc = 10.0 * dx |
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54 | ic = ( nx+1 ) / 2 |
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55 | jc = ic |
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56 | kc = nzt / 2 |
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57 | |
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58 | ! |
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59 | !-- Compute the perturbation. |
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60 | DO i = nxl, nxr |
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61 | DO j = nys, nyn |
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62 | DO k = nzb+1, nzt |
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63 | x = ( i - ic ) * dx |
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64 | y = ( j - jc ) * dy |
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65 | z = ABS( zu(k) - zu(kc) ) |
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66 | radius = SQRT( x**2 + y**2 + z**2 ) |
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67 | IF ( radius <= rc ) THEN |
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68 | betrag = 5.0 * EXP( -( radius * 0.001 / 2.0 )**2 ) |
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69 | ELSE |
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70 | betrag = 0.0 |
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71 | ENDIF |
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72 | |
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73 | pt(k,j,i) = pt(k,j,i) + betrag |
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74 | |
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75 | ENDDO |
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76 | ENDDO |
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77 | ENDDO |
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78 | |
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79 | ! |
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80 | !-- Exchange of boundary values for temperature |
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81 | CALL exchange_horiz( pt, nbgp ) |
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82 | |
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83 | |
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84 | END SUBROUTINE init_pt_anomaly |
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