Erosion example — Welcome to LS-DYNA Examples

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This examples features a simple CESE input deck coupled with a structural problem. An incoming pressure wave hits a thin plate. Under the load, the elements get progressively eroded allowing the fluid to flow through.

Description

This examples features a simple CESE input deck coupled with a structural problem. An incoming pressure wave hits a thin plate. Under the load, the elements get progressively eroded allowing the fluid to flow through.

Animated Result

CESE Pressure fringes

ezgif.comvideotogif.gif

Keywords

*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
*CONTROL_TERMINATION
*DATABASE_BINARY_D3PLOT
*DEFINE_CURVE
*ELEMENT_SHELL
*ELEMENT_SOLID
*KEYWORD
*MAT_PLASTIC_KINEMATIC
*MAT_RIGID
*NODE
*PARAMETER
*PART
*TITLE
*SECTION_SHELL
*SET_PART_LIST
*SET_SEGMENT

Reduced Input

$-----------------------------------------------------------------------------
$
$ 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 Erosion example
*INCLUDE
mesh.k
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
$                                                                              $
$                           CESE CONTROL CARDS                                 $
$                                                                              $
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*CESE_CONTROL_SOLVER
$   iframe     iflow     igeom
       200         1         3
*CESE_CONTROL_TIMESTEP
$     iddt       cfl     dtint
         2&cfl_fluid &dt_fluid                 
*CESE_CONTROL_LIMITER
$    idlmt      alfa      beta      epsr
         0       2.0       1.0       0.5
$
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
$                                                                              $
$                       CESE PARTS/ EOS/ MATERIAL                              $
$                                                                              $
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8 
*CESE_PART
$      pid       mid     eosid
        22                   3
*CESE_EOS_IDEAL_GAS
$    eosid        cv        cp
         3       &Cv       &Cp
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
$                                                                              $
$                    CESE BOUNDARY/INITIAL CONDITIONS                          $
$                                                                              $
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*CESE_BOUNDARY_PRESCRIBED_SET
$     SSID
       101
$   LCID_U    LCID_V    LCID_W    LCID_D    LCID_P    LCID_T
                                                          -1
$     SF_U      SF_V      SF_W      SF_D      SF_P      SF_T
       0.0       0.0        &W     &ro_2      &P_2
$
$ OUTFLOW BC (RIGHT)
$
*CESE_BOUNDARY_NON_REFLECTIVE_SET
$     SSID
       102
$ SOLID BC (other sides)
*CESE_BOUNDARY_SOLID_WALL_SET
       103
       104
       105
       106
*CESE_INITIAL
$      uic       vic       wic     rhoic       pic       tic       hic
       0.0       0.0       0.0     &ro_1      &P_1 
*END

Figures

Cylinder Flow

Download

CESE_example_erosion.zip