| 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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