Q.. Where can I find a 2D FSI example that uses the Multifield Solver?
A. Use the input file listed below.
/batch
!!!!!!!!! Fluid Structures problem set up. Flow over a wall.
!! SI units are used Free stream velocity is 56m/sec
!! (about 125 mph). The wall is 4 meters high and
!! .25 meters thick.
!!
!! This file sets up and performs the Multifield analysis for
!! ANSYS8.0. Multiple Staggers
!!
!! Property/Multified modification of "fsi8.inp".
!!
!! Field 1 is the Fluid analysis
!! Field 2 is the structural analysis
!!
!! Create geometry
/prep7
et,1,141,,,,1
et,2,42
mp,ex,2,1.39E+8
mp,nuxy,2,.3
x0=0
hw=4
xw=4
ht=.125
xt=.25
dx=.25
d1=4
d2=4
y1=4
yh=.2
y2=8
y3=80
k,1,-ht,0
k,2,ht,0
k,3,-ht,hw
k,4,ht,hw
x6=ht+dx
k,6,x6,0
k,5,x6,y1
k,7,-x6,0
k,8,-x6,y1
k,13,0,hw+ht
k,14,0,hw+ht+yh
x9=x6+d1
k,9,x9,0
k,11,x9,y1
k,10,-x9,0
k,12,-x9,y1
x17=x9+d2
k,17,x17,0
k,15,x17,y2
k,18,-x17,0
k,16,-x17,y2
k,19,-x6-xw/3.,y2
k,20,x6+xw/3.,y2
xe=80
xs=-30
k,21,xs,0
k,22,xs,y2
k,23,xs,y3
k,24,-x17-xw/2,y3
k,25,-xw,y3
k,26,xw,y3
k,27,x17+xw/2,y3
k,30,xe,y3
k,29,xe,y2
k,28,xe,0
k,31,0,y2
k,32,0,y3
l,1,7
l,3,8
l,13,14
l,4,5
l,2,6
l,7,10
l,6,9
l,8,12
l,5,11
l,10,12
l,9,11
l,18,16
l,17,15
l,10,18
l,9,17
l,12,16
l,8,19
l,14,31
l,5,20
l,11,15
l,19,16
l,20,15
l,1,3
l,2,4
l,7,8
l,6,5
l,1,2
l,3,4
larc,13,3,4,ht
larc,14,8,4,4*ht
l,31,19
l,32,25
larc,13,4,3,ht
larc,14,5,3,4*ht
l,31,20
l,32,26
l,25,24
l,24,23
l,16,22
l,18,21
l,17,28
l,15,29
l,27,30
l,26,27
l,21,22
l,28,29
l,22,23
l,16,24
l,19,25
l,31,32
l,20,26
l,15,27
l,29,30
mx1=3
mx2=5
mx3=6
rx3=6
mx4=15
rx4=2
rxm4=1.5
mx5=10
rx5=2
mx6=30
rx6=3
mx7=12
rx7=-2
my1=12
ry1=-3
rym1=3
my2=40
ry2=3
lsel,s,,,29,36
lesize,all,,,mx2
lsel,s,,,1,5
lesize,all,,,mx3,rx3
lsel,s,,,6,9
lesize,all,,,mx4,rx4
lsel,s,,,21,22
lesize,all,,,mx4,rxm4
lsel,s,,,37,44,7
lesize,all,,,mx4
lsel,s,,,14,20
lesize,all,,,mx5,rx5
lsel,s,,,41,43
lesize,all,,,mx6,rx6
lsel,s,,,38,40
lesize,all,,,mx7,rx7
lsel,s,,,23,26
lesize,all,,,my1,ry1
Q.. Where can I find a 2D FSI example that uses the Multifield Solver? A. Use the input file listed below. /batch !!!!!!!!! Fluid Structures problem set up. Flow over a wall. !! SI units are used Free stream velocity is 56m/sec !! (about 125 mph). The wall is 4 meters high and !! .25 meters thick. !! !! This file sets up and performs the Multifield analysis for !! ANSYS8.0. Multiple Staggers !! !! Property/Multified modification of "fsi8.inp". !! !! Field 1 is the Fluid analysis !! Field 2 is the structural analysis !! !! Create geometry /prep7 et,1,141,,,,1 et,2,42 mp,ex,2,1.39E+8 mp,nuxy,2,.3 x0=0 hw=4 xw=4 ht=.125 xt=.25 dx=.25 d1=4 d2=4 y1=4 yh=.2 y2=8 y3=80 k,1,-ht,0 k,2,ht,0 k,3,-ht,hw k,4,ht,hw x6=ht+dx k,6,x6,0 k,5,x6,y1 k,7,-x6,0 k,8,-x6,y1 k,13,0,hw+ht k,14,0,hw+ht+yh x9=x6+d1 k,9,x9,0 k,11,x9,y1 k,10,-x9,0 k,12,-x9,y1 x17=x9+d2 k,17,x17,0 k,15,x17,y2 k,18,-x17,0 k,16,-x17,y2 k,19,-x6-xw/3.,y2 k,20,x6+xw/3.,y2 xe=80 xs=-30 k,21,xs,0 k,22,xs,y2 k,23,xs,y3 k,24,-x17-xw/2,y3 k,25,-xw,y3 k,26,xw,y3 k,27,x17+xw/2,y3 k,30,xe,y3 k,29,xe,y2 k,28,xe,0 k,31,0,y2 k,32,0,y3 l,1,7 l,3,8 l,13,14 l,4,5 l,2,6 l,7,10 l,6,9 l,8,12 l,5,11 l,10,12 l,9,11 l,18,16 l,17,15 l,10,18 l,9,17 l,12,16 l,8,19 l,14,31 l,5,20 l,11,15 l,19,16 l,20,15 l,1,3 l,2,4 l,7,8 l,6,5 l,1,2 l,3,4 larc,13,3,4,ht larc,14,8,4,4*ht l,31,19 l,32,25 larc,13,4,3,ht larc,14,5,3,4*ht l,31,20 l,32,26 l,25,24 l,24,23 l,16,22 l,18,21 l,17,28 l,15,29 l,27,30 l,26,27 l,21,22 l,28,29 l,22,23 l,16,24 l,19,25 l,31,32 l,20,26 l,15,27 l,29,30 mx1=3 mx2=5 mx3=6 rx3=6 mx4=15 rx4=2 rxm4=1.5 mx5=10 rx5=2 mx6=30 rx6=3 mx7=12 rx7=-2 my1=12 ry1=-3 rym1=3 my2=40 ry2=3 lsel,s,,,29,36 lesize,all,,,mx2 lsel,s,,,1,5 lesize,all,,,mx3,rx3 lsel,s,,,6,9 lesize,all,,,mx4,rx4 lsel,s,,,21,22 lesize,all,,,mx4,rxm4 lsel,s,,,37,44,7 lesize,all,,,mx4 lsel,s,,,14,20 lesize,all,,,mx5,rx5 lsel,s,,,41,43 lesize,all,,,mx6,rx6 lsel,s,,,38,40 lesize,all,,,mx7,rx7 lsel,s,,,23,26 lesize,all,,,my1,ry1 lsel,s,,,10,13 lsel,a,,,45,46 lesize,all,,,my1,rym1 lsel,s,,,47,53 lesize,all,,,my2,ry2 lsel,s,,,27,28 lesize,all,,,mx1 lsel,all a,18,10,12,16 a,10,7,8,12 a,12,8,19,16 a,8,14,31,19 a,14,5,20,31 a,5,11,15,20 a,6,9,11,5 a,9,17,15,11 a,7,1,3,8 a,3,13,14,8 a,13,4,5,14 a,2,6,5,4 a,21,18,16,22 a,22,16,24,23 a,16,19,25,24 a,19,31,32,25 a,31,20,26,32 a,20,15,27,26 a,15,29,30,27 a,17,28,29,15 aatt,1,1,1 mshkey,2 amesh,all !! !!!!!!!!!!!! Structural model !! numstr,line,100 numstr,area,100 lsel,s,,,23,24 lsel,a,,,27,29 lsel,a,,,33 lgen,2,all,,,0,0,0,,1 al,100,102,101,103 al,103,105,104 lesize,104,,,3,1 lesize,105,,,3,1 lesize,100,,,25,1 lesize,101,,,25,1 asel,s,,,100,101 aatt,2,2,2 amesh,all alls save,flus1,db ! Contains only geometry and mesh !!! !!!!! Fluid Boundary Conditions !! Inlet lsel,s,,,32 lsel,a,,,36,38 lsel,a,,,43,47 lsel,u,,,46 nsll,,1 d,all,vx,56 d,all,vy,0 !! Walls lsel,s,,,1 lsel,a,,,5,7 lsel,a,,,14,15 lsel,a,,,40,41 lsel,a,,,23,24 lsel,a,,,29,33,4 nsll,,1 d,all,vx,0 d,all,vy,0 !! Outlet lsel,s,,,46,53,7 nsll,,1 d,all,pres,0. alls !!!!! Displacement conditions on fluid boundary asel,s,,,13,20 nsla,,1 d,all,ux,0 d,all,uy,0 lsel,s,,,1 lsel,a,,,5,7 lsel,a,,,14,15 nsll,,1 d,all,ux,0 d,all,uy,0 !! Structural Constraints lsel,s,,,102 nsll,,1 d,all,ux,0 d,all,uy,0 save,flus2,db ! Contains Geometry, mesh, & BC (No fsi) fini /SOLU !! !! Multifield Boundary Conditions !! Single boundary : the wall lsel,s,,,23,24 lsel,a,,,29,33,4 nsll,,1 sf,all,fsin,1 lsel,s,,,100,101 lsel,a,,,104,105 nsll,,1 sf,all,fsin,1 alls !! !!!!!!!!!!!! FLOTRAN controls !! flda,solu,ale,t flda,iter,exec,300 flda,outp,sumf,50 flda,solu,turb,t flda,prot,dens,air-si flda,prot,visc,air-si flda,prot,cond,air-si flda,prot,spht,air-si flda,mir,mome,.5 flda,mir,turb,.5 ! mfcmmand,1,fluid,cmd ! Command !! !!!!!!!!!!!! Structural controls antyp,static solcontrol,off nlgeom,on eqslv,sparse mfcmmand,2,structure,cmd ! Command !! !!! MF boundary 1: field 1 sends forces to field 2 mfsurface,1,1,forc,2 !!! MF boundary 1 : field 2 sends displacements to field 1 mfsurface,1,2,disp,1 !! !!! Multifield Controls !!! Turn multifield analysis on mfan,on !! !!! Define fields by element types mfelem,1,1 ! Field 1 is fluid mffname,1,fluid mfelem,2,2 ! Field 2 is solid mffname,2,structure !! !!! Specify calculation frequencies mfcalc,1,1 mfcalc,2,1 !! !!! Time increment mfdtime,1.0 !! End time mftime,1.0 !! !!! Analysis order mforder,1,2 ! Field 1 first !!! Type of load transfer mfinter,nonc !! !!! Stagger iterations mfiter,10 !! !!! Relaxation mfrelax,forc,1.0 mfrelax,disp,1.0 !! !! Convergence mfconv,fx,1.E-3 mfconv,ux,1.E-3 !! !! Output frequency mfoutput,1 save,flus3,db solve |
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