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source: palm/trunk/SOURCE/coriolis.f90 @ 4820

Last change on this file since 4820 was 4559, checked in by raasch, 4 years ago
files re-formatted to follow the PALM coding standard
Property svn:keywords set to `Id`
File size: 12.0 KB

Rev	Line
[1873]	1	!> @file coriolis.f90
[4559]	2	!--------------------------------------------------------------------------------------------------!
[2696]	3	! This file is part of the PALM model system.
[1036]	4	!
[4559]	5	! PALM is free software: you can redistribute it and/or modify it under the terms of the GNU General
	6	! Public License as published by the Free Software Foundation, either version 3 of the License, or
	7	! (at your option) any later version.
[1036]	8	!
[4559]	9	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the
	10	! implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
	11	! Public License for more details.
[1036]	12	!
[4559]	13	! You should have received a copy of the GNU General Public License along with PALM. If not, see
	14	! <http://www.gnu.org/licenses/>.
[1036]	15	!
[4360]	16	! Copyright 1997-2020 Leibniz Universitaet Hannover
[4559]	17	!--------------------------------------------------------------------------------------------------!
[1036]	18	!
[254]	19	! Current revisions:
[1]	20	! -----------------
[1354]	21	!
[3183]	22	!
[1321]	23	! Former revisions:
	24	! -----------------
	25	! $Id: coriolis.f90 4559 2020-06-11 08:51:48Z gronemeier $
[4559]	26	! file re-formatted to follow the PALM coding standard
	27	!
	28	! 4360 2020-01-07 11:25:50Z suehring
	29	! Introduction of wall_flags_total_0, which currently sets bits based on static topography
	30	! information used in wall_flags_static_0
	31	!
[4346]	32	! 4329 2019-12-10 15:46:36Z motisi
[4329]	33	! Renamed wall_flags_0 to wall_flags_static_0
[4559]	34	!
[4329]	35	! 4196 2019-08-29 11:02:06Z gronemeier
[4196]	36	! Consider rotation of model domain
[4559]	37	!
[4196]	38	! 4182 2019-08-22 15:20:23Z scharf
[4182]	39	! Corrected "Former revisions" section
[4559]	40	!
[4182]	41	! 3655 2019-01-07 16:51:22Z knoop
[3634]	42	! OpenACC port for SPEC
[1321]	43	!
[4182]	44	! Revision 1.1 1997/08/29 08:57:38 raasch
	45	! Initial revision
	46	!
	47	!
[1]	48	! Description:
	49	! ------------
[1682]	50	!> Computation of all Coriolis terms in the equations of motion.
[4559]	51	!>
	52	!> @note In this routine the topography is masked, even though this is again done in
	53	!> prognostic_equations. However, omitting the masking here lead to slightly different results.
	54	!> Reason unknown.
	55	!--------------------------------------------------------------------------------------------------!
[1682]	56	MODULE coriolis_mod
[1]	57
[4559]	58
[1]	59	PRIVATE
[2118]	60	PUBLIC coriolis
[1]	61
	62	INTERFACE coriolis
	63	MODULE PROCEDURE coriolis
	64	MODULE PROCEDURE coriolis_ij
	65	END INTERFACE coriolis
	66
	67	CONTAINS
	68
	69
[4559]	70	!--------------------------------------------------------------------------------------------------!
[1682]	71	! Description:
	72	! ------------
	73	!> Call for all grid points
[4559]	74	!--------------------------------------------------------------------------------------------------!
[1]	75	SUBROUTINE coriolis( component )
	76
[4559]	77	USE arrays_3d, &
	78	ONLY: tend, u, ug, v, vg, w
[4196]	79
[4559]	80	USE basic_constants_and_equations_mod, &
[4196]	81	ONLY: pi
	82
[4559]	83	USE control_parameters, &
[4196]	84	ONLY: f, fs, message_string, rotation_angle
[4559]	85
	86	USE indices, &
	87	ONLY: nxl, nxlu, nxr, nyn, nys, nysv, nzb, nzt, wall_flags_total_0
	88
[1320]	89	USE kinds
[1]	90
	91	IMPLICIT NONE
	92
[4196]	93	INTEGER(iwp) :: component !< component of momentum equation
[4559]	94	INTEGER(iwp) :: i !< running index x direction
	95	INTEGER(iwp) :: j !< running index y direction
	96	INTEGER(iwp) :: k !< running index z direction
[1]	97
[4196]	98	REAL(wp) :: cos_rot_angle !< cosine of model rotation angle
[3182]	99	REAL(wp) :: flag !< flag to mask topography
[4196]	100	REAL(wp) :: sin_rot_angle !< sine of model rotation angle
[2696]	101
[1]	102	!
[4196]	103	!-- Precalculate cosine and sine of rotation angle
	104	cos_rot_angle = COS( rotation_angle * pi / 180.0_wp )
	105	sin_rot_angle = SIN( rotation_angle * pi / 180.0_wp )
	106
	107	!
[1]	108	!-- Compute Coriolis terms for the three velocity components
	109	SELECT CASE ( component )
	110
	111	!
	112	!-- u-component
	113	CASE ( 1 )
[3634]	114	!$ACC PARALLEL LOOP COLLAPSE(3) PRIVATE(i, j, k, flag) &
[4346]	115	!$ACC PRESENT(wall_flags_total_0) &
[3634]	116	!$ACC PRESENT(v, w, vg) &
	117	!$ACC PRESENT(tend)
[106]	118	DO i = nxlu, nxr
[1]	119	DO j = nys, nyn
[2232]	120	DO k = nzb+1, nzt
	121	!
[2696]	122	!-- Predetermine flag to mask topography
[4346]	123	flag = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_total_0(k,j,i), 1 ) )
[2232]	124
[4196]	125	tend(k,j,i) = tend(k,j,i) + flag * &
	126	( f &
	127	* ( 0.25_wp * ( v(k,j,i-1) + v(k,j,i) + v(k,j+1,i-1) + v(k,j+1,i) ) &
	128	- vg(k) ) &
	129	- fs * cos_rot_angle &
	130	* 0.25_wp * ( w(k-1,j,i-1) + w(k-1,j,i) + w(k,j,i-1) + w(k,j,i) ) &
	131	)
[1]	132	ENDDO
	133	ENDDO
	134	ENDDO
	135
	136	!
	137	!-- v-component
	138	CASE ( 2 )
[3634]	139	!$ACC PARALLEL LOOP COLLAPSE(3) PRIVATE(i, j, k, flag) &
[4346]	140	!$ACC PRESENT(wall_flags_total_0) &
[4196]	141	!$ACC PRESENT(u, w, ug) &
[3634]	142	!$ACC PRESENT(tend)
[1]	143	DO i = nxl, nxr
[106]	144	DO j = nysv, nyn
[2232]	145	DO k = nzb+1, nzt
[2696]	146	!
	147	!-- Predetermine flag to mask topography
[4346]	148	flag = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_total_0(k,j,i), 2 ) )
[2696]	149
[4196]	150	tend(k,j,i) = tend(k,j,i) - flag * &
	151	( f &
	152	* ( 0.25_wp * ( u(k,j-1,i) + u(k,j,i) + u(k,j-1,i+1) + u(k,j,i+1) ) &
	153	- ug(k) ) &
	154	+ fs * sin_rot_angle &
	155	* 0.25_wp * ( w(k,j,i) + w(k-1,j,i) + w(k,j-1,i) + w(k-1,j-1,i) ) &
	156	)
[1]	157	ENDDO
	158	ENDDO
	159	ENDDO
	160
	161	!
	162	!-- w-component
	163	CASE ( 3 )
[3634]	164	!$ACC PARALLEL LOOP COLLAPSE(3) PRIVATE(i, j, k, flag) &
[4346]	165	!$ACC PRESENT(wall_flags_total_0) &
[4196]	166	!$ACC PRESENT(u, v) &
[3634]	167	!$ACC PRESENT(tend)
[1]	168	DO i = nxl, nxr
	169	DO j = nys, nyn
[2232]	170	DO k = nzb+1, nzt
[2696]	171	!
	172	!-- Predetermine flag to mask topography
[4346]	173	flag = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_total_0(k,j,i), 3 ) )
[2696]	174
[4559]	175	tend(k,j,i) = tend(k,j,i) &
	176	+ fs * 0.25_wp * flag &
	177	* ( cos_rot_angle &
	178	* ( u(k,j,i) + u(k+1,j,i) + u(k,j,i+1) + u(k+1,j,i+1) ) &
	179	+ sin_rot_angle &
	180	* ( v(k,j,i) + v(k+1,j,i) + v(k,j+1,i) + v(k+1,j+1,i) ) &
	181	)
[1]	182	ENDDO
	183	ENDDO
	184	ENDDO
	185
	186	CASE DEFAULT
	187
[254]	188	WRITE( message_string, * ) ' wrong component: ', component
	189	CALL message( 'coriolis', 'PA0173', 1, 2, 0, 6, 0 )
[1]	190
	191	END SELECT
	192
	193	END SUBROUTINE coriolis
	194
	195
[4559]	196	!--------------------------------------------------------------------------------------------------!
[1682]	197	! Description:
	198	! ------------
	199	!> Call for grid point i,j
[4559]	200	!--------------------------------------------------------------------------------------------------!
[1]	201	SUBROUTINE coriolis_ij( i, j, component )
	202
[4559]	203	USE arrays_3d, &
	204	ONLY: tend, u, ug, v, vg, w
[4196]	205
[4559]	206	USE basic_constants_and_equations_mod, &
[4196]	207	ONLY: pi
	208
[4559]	209	USE control_parameters, &
[4196]	210	ONLY: f, fs, message_string, rotation_angle
[4559]	211
	212	USE indices, &
[4346]	213	ONLY: nzb, nzt, wall_flags_total_0
[4559]	214
[1320]	215	USE kinds
[4196]	216
[1]	217	IMPLICIT NONE
	218
[4196]	219	INTEGER(iwp) :: component !< component of momentum equation
[4559]	220	INTEGER(iwp) :: i !< running index x direction
	221	INTEGER(iwp) :: j !< running index y direction
	222	INTEGER(iwp) :: k !< running index z direction
[1]	223
[4196]	224	REAL(wp) :: cos_rot_angle !< cosine of model rotation angle
	225	REAL(wp) :: flag !< flag to mask topography
	226	REAL(wp) :: sin_rot_angle !< sine of model rotation angle
[2232]	227
[1]	228	!
[4196]	229	!-- Precalculate cosine and sine of rotation angle
	230	cos_rot_angle = COS( rotation_angle * pi / 180.0_wp )
	231	sin_rot_angle = SIN( rotation_angle * pi / 180.0_wp )
	232
	233	!
[1]	234	!-- Compute Coriolis terms for the three velocity components
	235	SELECT CASE ( component )
	236
	237	!
	238	!-- u-component
	239	CASE ( 1 )
[2232]	240	DO k = nzb+1, nzt
	241	!
	242	!-- Predetermine flag to mask topography
[4346]	243	flag = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_total_0(k,j,i), 1 ) )
[2232]	244
[4196]	245	tend(k,j,i) = tend(k,j,i) + flag * &
	246	( f &
	247	* ( 0.25_wp * ( v(k,j,i-1) + v(k,j,i) + v(k,j+1,i-1) + v(k,j+1,i) ) &
	248	- vg(k) ) &
	249	- fs * cos_rot_angle &
	250	* 0.25_wp * ( w(k-1,j,i-1) + w(k-1,j,i) + w(k,j,i-1) + w(k,j,i) ) &
	251	)
[1]	252	ENDDO
	253
	254	!
	255	!-- v-component
	256	CASE ( 2 )
[2232]	257	DO k = nzb+1, nzt
[2696]	258	!
	259	!-- Predetermine flag to mask topography
[4346]	260	flag = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_total_0(k,j,i), 2 ) )
[2696]	261
[4196]	262	tend(k,j,i) = tend(k,j,i) - flag * &
[4559]	263	( f &
	264	* ( 0.25_wp * ( u(k,j-1,i) + u(k,j,i) + u(k,j-1,i+1) + u(k,j,i+1) )&
	265	- ug(k) ) &
	266	+ fs * sin_rot_angle &
	267	* 0.25_wp * ( w(k,j,i) + w(k-1,j,i) + w(k,j-1,i) + w(k-1,j-1,i) ) &
	268	)
[1]	269	ENDDO
	270
	271	!
	272	!-- w-component
	273	CASE ( 3 )
[2232]	274	DO k = nzb+1, nzt
[2696]	275	!
	276	!-- Predetermine flag to mask topography
[4346]	277	flag = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_total_0(k,j,i), 3 ) )
[2696]	278
[4559]	279	tend(k,j,i) = tend(k,j,i) &
	280	+ fs * 0.25_wp * flag &
	281	* ( cos_rot_angle &
	282	* ( u(k,j,i) + u(k+1,j,i) + u(k,j,i+1) + u(k+1,j,i+1) ) &
	283	+ sin_rot_angle &
	284	* ( v(k,j,i) + v(k+1,j,i) + v(k,j+1,i) + v(k+1,j+1,i) ) &
	285	)
[1]	286	ENDDO
	287
	288	CASE DEFAULT
	289
[254]	290	WRITE( message_string, * ) ' wrong component: ', component
	291	CALL message( 'coriolis', 'PA0173', 1, 2, 0, 6, 0 )
[1]	292
	293	END SELECT
	294
	295	END SUBROUTINE coriolis_ij
	296
	297	END MODULE coriolis_mod

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