# 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/prep7et,1,141,,,,1et,2,42mp,ex,2,1.39E+8mp,nuxy,2,.3x0=0hw=4xw=4ht=.125xt=.25dx=.25d1=4d2=4y1=4yh=.2y2=8y3=80k,1,-ht,0k,2,ht,0k,3,-ht,hwk,4,ht,hwx6=ht+dxk,6,x6,0k,5,x6,y1k,7,-x6,0k,8,-x6,y1k,13,0,hw+htk,14,0,hw+ht+yhx9=x6+d1k,9,x9,0k,11,x9,y1k,10,-x9,0k,12,-x9,y1x17=x9+d2k,17,x17,0k,15,x17,y2k,18,-x17,0k,16,-x17,y2k,19,-x6-xw/3.,y2k,20,x6+xw/3.,y2xe=80xs=-30k,21,xs,0k,22,xs,y2k,23,xs,y3k,24,-x17-xw/2,y3k,25,-xw,y3k,26,xw,y3k,27,x17+xw/2,y3k,30,xe,y3k,29,xe,y2k,28,xe,0k,31,0,y2k,32,0,y3l,1,7l,3,8l,13,14l,4,5l,2,6l,7,10l,6,9l,8,12l,5,11l,10,12l,9,11l,18,16l,17,15l,10,18l,9,17l,12,16l,8,19l,14,31l,5,20l,11,15l,19,16l,20,15l,1,3l,2,4l,7,8l,6,5l,1,2l,3,4larc,13,3,4,htlarc,14,8,4,4*htl,31,19l,32,25larc,13,4,3,htlarc,14,5,3,4*htl,31,20l,32,26l,25,24l,24,23l,16,22l,18,21l,17,28l,15,29l,27,30l,26,27l,21,22l,28,29l,22,23l,16,24l,19,25l,31,32l,20,26l,15,27l,29,30mx1=3mx2=5mx3=6rx3=6mx4=15rx4=2rxm4=1.5mx5=10rx5=2mx6=30rx6=3mx7=12rx7=-2my1=12ry1=-3rym1=3my2=40ry2=3lsel,s,,,29,36lesize,all,,,mx2lsel,s,,,1,5lesize,all,,,mx3,rx3lsel,s,,,6,9lesize,all,,,mx4,rx4lsel,s,,,21,22lesize,all,,,mx4,rxm4lsel,s,,,37,44,7lesize,all,,,mx4lsel,s,,,14,20lesize,all,,,mx5,rx5lsel,s,,,41,43lesize,all,,,mx6,rx6lsel,s,,,38,40lesize,all,,,mx7,rx7lsel,s,,,23,26lesize,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/prep7et,1,141,,,,1et,2,42mp,ex,2,1.39E+8mp,nuxy,2,.3x0=0hw=4xw=4ht=.125xt=.25dx=.25d1=4d2=4y1=4yh=.2y2=8y3=80k,1,-ht,0k,2,ht,0k,3,-ht,hwk,4,ht,hwx6=ht+dxk,6,x6,0k,5,x6,y1k,7,-x6,0k,8,-x6,y1k,13,0,hw+htk,14,0,hw+ht+yhx9=x6+d1k,9,x9,0k,11,x9,y1k,10,-x9,0k,12,-x9,y1x17=x9+d2k,17,x17,0k,15,x17,y2k,18,-x17,0k,16,-x17,y2k,19,-x6-xw/3.,y2k,20,x6+xw/3.,y2xe=80xs=-30k,21,xs,0k,22,xs,y2k,23,xs,y3k,24,-x17-xw/2,y3k,25,-xw,y3k,26,xw,y3k,27,x17+xw/2,y3k,30,xe,y3k,29,xe,y2k,28,xe,0k,31,0,y2k,32,0,y3l,1,7l,3,8l,13,14l,4,5l,2,6l,7,10l,6,9l,8,12l,5,11l,10,12l,9,11l,18,16l,17,15l,10,18l,9,17l,12,16l,8,19l,14,31l,5,20l,11,15l,19,16l,20,15l,1,3l,2,4l,7,8l,6,5l,1,2l,3,4larc,13,3,4,htlarc,14,8,4,4*htl,31,19l,32,25larc,13,4,3,htlarc,14,5,3,4*htl,31,20l,32,26l,25,24l,24,23l,16,22l,18,21l,17,28l,15,29l,27,30l,26,27l,21,22l,28,29l,22,23l,16,24l,19,25l,31,32l,20,26l,15,27l,29,30mx1=3mx2=5mx3=6rx3=6mx4=15rx4=2rxm4=1.5mx5=10rx5=2mx6=30rx6=3mx7=12rx7=-2my1=12ry1=-3rym1=3my2=40ry2=3lsel,s,,,29,36lesize,all,,,mx2lsel,s,,,1,5lesize,all,,,mx3,rx3lsel,s,,,6,9lesize,all,,,mx4,rx4lsel,s,,,21,22lesize,all,,,mx4,rxm4lsel,s,,,37,44,7lesize,all,,,mx4lsel,s,,,14,20lesize,all,,,mx5,rx5lsel,s,,,41,43lesize,all,,,mx6,rx6lsel,s,,,38,40lesize,all,,,mx7,rx7lsel,s,,,23,26lesize,all,,,my1,ry1lsel,s,,,10,13lsel,a,,,45,46lesize,all,,,my1,rym1lsel,s,,,47,53lesize,all,,,my2,ry2lsel,s,,,27,28lesize,all,,,mx1lsel,alla,18,10,12,16a,10,7,8,12a,12,8,19,16a,8,14,31,19a,14,5,20,31a,5,11,15,20a,6,9,11,5a,9,17,15,11a,7,1,3,8a,3,13,14,8a,13,4,5,14a,2,6,5,4a,21,18,16,22a,22,16,24,23a,16,19,25,24a,19,31,32,25a,31,20,26,32a,20,15,27,26a,15,29,30,27a,17,28,29,15aatt,1,1,1mshkey,2amesh,all!!!!!!!!!!!!!! Structural model!!numstr,line,100numstr,area,100lsel,s,,,23,24lsel,a,,,27,29lsel,a,,,33lgen,2,all,,,0,0,0,,1al,100,102,101,103al,103,105,104lesize,104,,,3,1lesize,105,,,3,1lesize,100,,,25,1lesize,101,,,25,1asel,s,,,100,101aatt,2,2,2amesh,allallssave,flus1,db ! Contains only geometry and mesh!!!!!!!! Fluid Boundary Conditions!! Inletlsel,s,,,32lsel,a,,,36,38lsel,a,,,43,47lsel,u,,,46nsll,,1d,all,vx,56d,all,vy,0!! Wallslsel,s,,,1lsel,a,,,5,7lsel,a,,,14,15lsel,a,,,40,41lsel,a,,,23,24lsel,a,,,29,33,4nsll,,1d,all,vx,0d,all,vy,0!! Outletlsel,s,,,46,53,7nsll,,1d,all,pres,0.alls!!!!! Displacement conditions on fluid boundaryasel,s,,,13,20nsla,,1d,all,ux,0d,all,uy,0lsel,s,,,1lsel,a,,,5,7lsel,a,,,14,15nsll,,1d,all,ux,0d,all,uy,0!! Structural Constraintslsel,s,,,102nsll,,1d,all,ux,0d,all,uy,0save,flus2,db ! Contains Geometry, mesh, & BC (No fsi)fini/SOLU!!!! Multifield Boundary Conditions!! Single boundary : the walllsel,s,,,23,24lsel,a,,,29,33,4nsll,,1sf,all,fsin,1lsel,s,,,100,101lsel,a,,,104,105nsll,,1sf,all,fsin,1alls!!!!!!!!!!!!!! FLOTRAN controls!!flda,solu,ale,tflda,iter,exec,300flda,outp,sumf,50flda,solu,turb,tflda,prot,dens,air-siflda,prot,visc,air-siflda,prot,cond,air-siflda,prot,spht,air-siflda,mir,mome,.5flda,mir,turb,.5!mfcmmand,1,fluid,cmd ! Command!!!!!!!!!!!!!! Structural controlsantyp,staticsolcontrol,offnlgeom,oneqslv,sparsemfcmmand,2,structure,cmd ! Command!!!!! MF boundary 1: field 1 sends forces to field 2mfsurface,1,1,forc,2!!! MF boundary 1 : field 2 sends displacements to field 1mfsurface,1,2,disp,1!!!!! Multifield Controls!!! Turn multifield analysis onmfan,on!!!!! Define fields by element typesmfelem,1,1 ! Field 1 is fluidmffname,1,fluidmfelem,2,2 ! Field 2 is solidmffname,2,structure!!!!! Specify calculation frequenciesmfcalc,1,1mfcalc,2,1!!!!! Time incrementmfdtime,1.0!! End timemftime,1.0!!!!! Analysis ordermforder,1,2 ! Field 1 first!!! Type of load transfermfinter,nonc!!!!! Stagger iterationsmfiter,10!!!!! Relaxationmfrelax,forc,1.0mfrelax,disp,1.0!!!! Convergencemfconv,fx,1.E-3mfconv,ux,1.E-3!!!! Output frequencymfoutput,1save,flus3,dbsolve