Intermediate : Water impact on rigid column
This case simulates the impact of a water column on a rigid obstacle and compares results with the experience. Note that there is a thin wet layer of fluid at the bottom. Warning : the mesh is fine, 8 CPUs or more are recommended for this case.
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Intermediate : Water impact on rigid column
This case simulates the impact of a water column on a rigid obstacle and compares results with the experience. Note that there is a thin wet layer of fluid at the bottom. Warning : the mesh is fine, 8 CPUs or more are recommended for this case.
Fluid pressure fringes
*KEYWORD *TITLE *DATABASE_BINARY_D3PLOT *DEFINE_CURVE_TITLE *ICFD_BOUNDARY_FREESLIP *ICFD_BOUNDARY_NONSLIP *ICFD_CONTROL_OUTPUT *ICFD_CONTROL_TIME *ICFD_DATABASE_DRAG *ICFD_DATABASE_POINTOUT *ICFD_MAT *ICFD_PART *ICFD_PART_VOL *ICFD_SECTION *INCLUDE *LOAD_BODY_Z *MESH_INTERF *MESH_SURFACE_ELEMENT *MESH_SURFACE_NODE *MESH_VOLUME *PARAMETER *END
$-----------------------------------------------------------------------------
$
$ Example provided by Iñaki (LSTC)
$
$ E-Mail: info@dynamore.de
$ Web: http://www.dynamore.de
$
$ Copyright, 2015 DYNAmore GmbH
$ Copying for non-commercial usage allowed if
$ copy bears this notice completely.
$
$X------------------------------------------------------------------------------
$X
$X 1. Run file as is.
$X Requires LS-DYNA MPP R8.0.0 (or higher) with double precision
$X
$X------------------------------------------------------------------------------
$# UNITS: (kg/m/s)
$X------------------------------------------------------------------------------
$X
*KEYWORD
*TITLE
ICFD Water impact on rigid column
*INCLUDE
mesh.k
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
$ $
$ PARAMETERS $
$ $
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*PARAMETER
R T_end 3.0
R dt_plot 0.05
$
$--- Fluid
$
Rrho_fluid 1000
R mu_fluid 0.001
R dt_fluid 0.000
Rcfl_fluid 0.90
R grav 9.81
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
$ $
$ ICFD CONTROL CARDS $
$ $
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*ICFD_CONTROL_TIME
$# ttm dt cfl
&T_end &dt_fluid&cfl_fluid
*ICFD_CONTROL_OUTPUT
$# msgl
4
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
$ $
$ ICFD PARTS/ SECTION/ MATERIAL $
$ $
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*ICFD_SECTION
$# sid
1
*ICFD_MAT
$# mid flg ro vis
1 1&rho_fluid &mu_fluid
*ICFD_MAT
$# mid flg
2 0
*ICFD_PART
$# pid secid mid
1 1 1
*ICFD_PART
$# pid secid mid
2 1 1
*ICFD_PART
$# pid secid mid
3 1 1
*ICFD_PART
$# pid secid mid
4 1 1
*ICFD_PART
$# pid secid mid
5 1 1
*ICFD_PART
$# pid secid mid
6 1 1
*ICFD_PART
$# pid secid mid
7 1 2
*ICFD_PART
$# pid secid mid
8 1 2
*ICFD_PART
$# pid secid mid
9 1 1
*ICFD_PART
$# pid secid mid
10 1 2
*ICFD_PART
$# pid secid mid
11 1 1
*ICFD_PART
$# pid secid mid
12 1 2
*ICFD_PART_VOL
$# pid secid mid
13 1 1
$# spid1 spid2 spid3 spid4 spid5 spid6 spid7 spid8
1 2 3 4 5 6 9 11
*ICFD_PART_VOL
$# pid secid mid
14 1 2
$# spid1 spid2 spid3 spid4 spid5 spid6 spid7 spid8
6 7 8 10 12
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
$ $
$ ICFD BOUNDARY/INITIAL/LOAD CONDITIONS $
$ $
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*ICFD_BOUNDARY_FREESLIP
$# pid
1
*ICFD_BOUNDARY_NONSLIP
$# pid
2
*ICFD_BOUNDARY_FREESLIP
$# pid
3
*ICFD_BOUNDARY_FREESLIP
$# pid
4
*ICFD_BOUNDARY_FREESLIP
$# pid
5
*ICFD_BOUNDARY_FREESLIP
$# pid
7
*ICFD_BOUNDARY_FREESLIP
$# pid
8
*ICFD_BOUNDARY_FREESLIP
$# pid
9
*ICFD_BOUNDARY_NONSLIP
$# pid
10
*ICFD_BOUNDARY_NONSLIP
$# pid
11
*ICFD_BOUNDARY_FREESLIP
$# pid
12
*LOAD_BODY_Z
$# lcid sf
1 1
*DEFINE_CURVE_TITLE
Gravity force
$# lcid sidr sfa sfo offa offo dattyp
1 &grav
$# a1 o1
0.0 1.0
10000.0 1.0
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
$ $
$ ICFD MESH KEYWORDS $
$ $
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*MESH_VOLUME
$# volid
30
$# pid1 pid2 pid3 pid4 pid5 pid6 pid7 pid8
1 2 3 4 5 7 8 9
$# pid10 pid11 pid12
10 11 12
*MESH_INTERF
$# volid
30
$# pid1
6
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
$ $
$ DATABASE (OUTPUT) $
$ $
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*DATABASE_BINARY_D3PLOT
&dt_plot
*ICFD_DATABASE_DRAG
$# pid
10
*ICFD_DATABASE_DRAG
$# pid
11
*ICFD_DATABASE_POINTOUT
$# outlv dt
1 5e-3
$# pid x y z
1 0.846 0. 0.026
*END
This case simulates the impact of a water column on a rigid obstacle and compares results with the experience. Note that there is a thin wet layer of fluid at the bottom. Warning : the mesh is fine, 8 CPUs or more are recommended for this case.
References :
[1] M. Gomez-Gesteira, A. J. C. Crespo, B. D. Rogers, R. A. Dalrymple, J. M. Dominguez, and A. Barreiro, “Sphysics - development of a free-surface fluid solver - part 2: Efficiency and test cases,” Comput. Geosci., vol. 48, pp. 300–307, Nov. 2012.
[2] T. Wu, A Numerical Study of three dimensional Breaking Waves and Turbulence effects. PhD thesis, Cornell University, 2004.
[3] T. B. Silvester and P. W. Cleary, “Wave-structure interaction using smoothed particle hydrodynamics,” (CSIRO, Melbourne, Australia), Fith International Conference on CFD in the Process Industries, December 2006.