This examples features a simple immersed FSI example. The active structure needs to be entirely embedded in the fluid for the immersed method. Interfaces are tracked automatically. It is advised to use a finer mesh for the fluid than for the solid. For FSI problems, the two solvers will use a synchronized timestep i.e the smallest value computed from their respective domains (CFL condition). No leakage can occur.
CESE Velocity fringes
*BOUNDARY_SPC_SET *CESE_BOUNDARY_NON_REFLECTIVE_SET *CESE_BOUNDARY_PRESCRIBED_SET *CESE_BOUNDARY_SOLID_WALL_SET *CESE_CONTROL_LIMITER *CESE_CONTROL_SOLVER *CESE_CONTROL_TIMESTEP *CESE_EOS_IDEAL_GAS *CESE_INITIAL *CESE_PART *CONTACT_AUTOMATIC_SINGLE_SURFACE_ID *CONTROL_CONTACT *CONTROL_TERMINATION *DATABASE_BINARY_D3PLOT *DEFINE_CURVE *ELEMENT_SOLID *KEYWORD *HOURGLASS *LOAD_BODY_PARTS *LOAD_BODY_Z *MAT_ELASTIC *NODE *PARAMETER *PART *TITLE *SECTION_SHELL *SECTION_SOLID *SET_PART_LIST *SET_SEGMENT
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$ 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------------------------------------------------------------------------------
$X
*KEYWORD
*TITLE
CESE Embedded FSI example
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$ $
$ PARAMETERS $
$ $
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*PARAMETER
R T_end 0.02
R dt_plot 1e-3
$
$--- Fluid
$
R dt_fluid 0.0001
Rcfl_fluid 0.9
R ro_1 1.22
R P_1 1.013e+5
R P_2 1.51988e+5
R cv 713.5
R cp 1001.5
*CONTROL_TERMINATION
$ endtim endcyc dtmin endeng endmas
&T_end
*INCLUDE
struc.k
*INCLUDE
cese.k
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$ $
$ DATABASE (OUTPUT) $
$ $
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*DATABASE_BINARY_D3PLOT
&dt_plot
*END