[分享]几个流体力学的例子

meil32 · 发表于 2005-12-16 20:04

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/title, Compressible Flow in a Converging Diverging Nozzle /prep7 ! Assign Element Type ! et,1,141 ! ! Create the Model Geometry ! /pnum,line,1 !k,1,0,2.432 k,2,0,0 k,3,1,2.432 k,4,1,0 k,5,2,2.232 k,6,2,0 k,7,5,0 k,8,5,.7 k,9,6,0 k,10,6,.5 k,11,14,0 k,12,14,.8 l,2,4 l,3,4 l,1,3 l,1,2 l,5,8 l2tan,3,5 l,10,12 l2tan,5,7 l,4,6 l,6,7 l,7,9 l,9,11 a,2,4,3,1 a,4,6,5,3 a,6,7,8,5 a,7,9,10,8 a,9,11,12,10 ! ! !Mesh the Model and Compress Numbers ! ntran=24 rtran=10 na=10 nb=10 nc=25 nd=10 ne=100 re=-1.5 lesize,4,,,ntran,rtran lesize,2,,,ntran,rtran lesize,13,,,ntran,1/rtran lesize,14,,,ntran,1/rtran lesize,15,,,ntran,1/rtran lesize,16,,,ntran,1/rtran lesize,1,,,na lesize,3,,,na lesize,6,,,nb lesize,9,,,nb lesize,5,,,nc lesize,10,,,nc lesize,8,,,nd lesize,11,,,nd lesize,7,,,ne,re lesize,12,,,ne,re amesh,all numcmp,node numcmp,elem ! ! Apply Boundary Conditions ! lsel,s,,,1 lsel,a,,,9,12,1 nsll,,1 d,all,vy,0 lsel,all lsel,s,,,4 nsll,,1 d,all,pres,6.13769e+6 lsel,all lsel,s,,,3 lsel,a,,,5,8,1 nsll,,1 d,all,vx,0 d,all,vy,0 lsel,all lsel,s,,,16 nsll,,1 d,all,pres,0 ! ! Set Fluid Properties ! alls /solu flda,prot,dens,air-cm flda,prot,visc,air-cm flda,prot,cond,air-cm flda,prot,spht,air-cm flda,vary,dens,t ! ! Set Flow Environment Parameters ! flda,pres,refe,1.01325e+6 flda,temp,ttot,550 flda,temp,nomi,550 ! ! Set Solution Options and CFD Solver Controls ! flda,solu,turb,t flda,solu,comp,t flda,meth,pres,3 flda,conv,pres,1e-12 ! ! Solve ! flda,relx,dens,1 flda,stab,mome,1 flda,stab,pres,1e-4 flda,stab,visc,10 flda,iter,exec,20 solve flda,stab,visc,1 solve flda,stab,visc,.1 solve flda,stab,visc,.01 solve flda,stab,visc,.001 solve flda,stab,visc,.0001 solve flda,stab,visc,.00001 solve flda,stab,visc,0 flda,iter,exec,160 solve flda,stab,mome,10 flda,stab,pres,1e-2 flda,iter,exec,100 solve flda,stab,mome,1e+15 flda,stab,pres,1e+15 flda,iter,exec,400 solve

meil32 · 发表于 2005-12-16 20:05

/BATCH,LIST /title,broken dam problem by the VOF solution. /com /com ------------------------------------------------------------------ /com ** Reference: "Part IV: An Experimental Study of the Collapse of /com ** Liquid Columns on a Rigid Horizontal Plane" /com ** By Martin and Moyce, Phil. Trans. Roy. Soc. /com ** (London,A244, pp. 312-324, 1952. /com ** "Volume of Fluid (VOF) Method for the Dynamics of /com ** Free Boundaries" By C.W. Hirt and B.D. Nichols, /com ** J. Comput. Physics, Vol. 39, pp. 201-225, 1981. /com ** /prep7 !!!!! Define some dimensions and gravity LX = 5.0 ! x length LY = 2.5 ! y length DELX = 0.2 ! x spacing DELY = 0.05 ! y spacing grav = 9.81 ! gravity et,1,141 !!!! meshing rect,0,LX,0,LY lsel,s,,,2,4,2 lesize,all,DELY lsel,s,,,1,3,2 lesize,all,DELX amesh,all
nsel,s,loc,y,0.0 ! wall boundary conditions nsel,a,loc,x,0.0 d,all,vx,0.0 d,all,vy,0.0
nsel,s,loc,x,0.0,1.0 ! setup initial VFRC nsel,r,loc,y,0.0,2.0 esln,s,1 ice,all,vfrc,1.0
alls ! initial conditions for vx & vy ic,all,vx,0 ic,all,vy,0 save fini
/solu !!!! FLOTRAN input acel,0.0,grav,0 FLDA,NOMI,DENS,1.0e3 FLDA,NOMI,VISC,1.0d-3 FLDA,SOLU,FLOW,T FLDA,SOLU,TRAN,T FLDA,SOLU,turb,F flda,solu,vof,t flda,time,glob,5 flda,time,numb,70 flda,time,step,0.01 flda,time,appe,0.1 flda,advm,mome,supg flda,relx,vx,0.5 flda,relx,vy,0.5 flda,relx,pres,1.0 solve fini

meil32 · 发表于 2005-12-16 20:05

/BATCH,LIST /title,initial development of flow over a bump. /com /com ------------------------------------------------------------------ /com ** Initial development of flow over a semi-circular bump /com ** Reference: "Critical Free-Surface Flow Over a Semi-Circular /com ** Obstruction" By L.K. Forbes, J. Eng. Math., /com ** vol. 22, pp. 3-13, 1998. /com ** "Computation of free-surface flows using the /com ** finite-volume method and moving grids", /com ** By S. Muzaferija and M. Peric, Numerical Heat /com ** Transfer, Part B, 32:369-384, 1997. /com ------------------------------------------------------------------ ! ! Property and parameter input rho = 1.0e0 ! density grav = 9.81 ! gravity mu = 1.0e-6 ! viscosity ! R = 0.03 ! bump radius L = 2*R H = 0.075 ! Inlet height H0 = R ! height above the Inlet outlen = 5.0*R ! Outlet length inlen = 5.0*R ! Inlet length ny1 = 8 ! number of elements in line 1 ny2 = 2 ! number of elements in line 2 ny3 = 4 ! number of elements in line 3 ry2 = 1.0 ! ratio of element size in line 2 ry3 = 1.0 ! ratio of element size in line 3 nx1 = 15 ! number of elements in line 13 nx2 = 15 ! number of elements in line 21 nx3 = 20 ! number of elements in line 17 rx1 = 0.5 ! ratio of element size in line 13 rx2 = 1.0 ! ratio of element size in line 25 rx3 = 1.5 ! ratio of element size in line 17 nr1 = 10 ! number of elements in radial direction near bump !! /prep7 et,1,141 k,1,-inlen,0.0 ! KP 1 - 4 are at the inlet k,2,-inlen,L k,3,-inlen,H k,4,-inlen,H+H0 ! l,1,2 ! Lines 1-3 are the inlet line l,2,3 l,3,4 ! k,5,-L,0.0 ! KP 5 - 8 are before the bump k,6,-L,L k,7,-L,H k,8,-L,H+H0 ! l,5,6 ! Lines 4-6 before the bump l,6,7 l,7,8 ! k,9,L,0.0 ! KP 9 - 12 are after the bump k,10,L,L k,11,L,H k,12,L,H+H0 ! l,9,10 ! Lines 7-9 after the bump l,10,11 l,11,12 ! k,13,outlen,0.0 ! KP 13 - 16 are at the outlet k,14,outlen,L k,15,outlen,H k,16,outlen,H+H0 ! l,13,14 ! Lines 10-12 at the outlet l,14,15 l,15,16 ! l,1,5 ! lines 13-16 are horizontal lines near inlet 
l,2,6 l,3,7 l,4,8 ! l,9,13 ! lines 17-20 are horizontal lines near outlet l,10,14 l,11,15 l,12,16 ! l,6,10 ! lines 21-23 are horizontal lines near the bump l,7,11 l,8,12 ! k,17,R,0.0 ! KP 17 to 23 are for the semi-circular bump k,18,0.0,0.0 circle,18,R,,17,180,4 lcomb,25,26,0 ! l,19,9 ! lines 26, 28-30 in radial direction near bump l,20,10 l,22,6 l,23,5 ! Select lines and establish line divisions lsel,s,,,1,4,3 lesize,all,,,ny1 ! lsel,s,,,2,11,3 lesize,all,,,ny2,ry2 ! lsel,s,,,3,12,3 lesize,all,,,ny3,ry3 ! lsel,s,,,13,16 lesize,all,,,nx1,rx1 ! lsel,s,,,21,23 lesize,all,,,nx2,1.0/rx2 lsel,s,,,25 lesize,all,,,nx2,rx2 ! lsel,s,,,17,20 lesize,all,,,nx3,rx3 ! lsel,s,,,27 lesize,all,,,ny1 ! lsel,s,,,26 lsel,a,,,28,30 lesize,all,,,nr1 ! ! define the y-direction mesh lsel,s,,,24 lsel,a,,,7 lsel,a,,,10 lesize,all,,,nx2,1.5 ! alls ! Create areas.... a,1,5,6,2 ! inlet a,2,6,7,3 a,3,7,8,4 a,9,13,14,10 ! outlet a,10,14,15,11 a,11,15,16,12 a,6,10,11,7 ! bump a,7,11,12,8 a,19,9,10,20 a,20,10,6,22 a,5,23,22,6 alls amesh,all ! ! Inlet boundary condition lsel,s,,,1,2 nsll,,1 d,all,vx,0.32 d,all,vy,0.0 !nsel,s,loc,x,-inlen !nsel,r,loc,y,0.0 !d,all,vx,0.001 ! boundary volume fraction (SFL and SFE commands) sfl,1,vfrc,1,,1 !sfl,2,vfrc,1,,1 lsel,s,,,2 esll sfe,all,4,vfrc,1,1.0 sfe,all,4,vfrc,2,1.0 !!!! The walls lsel,s,,,13 lsel,a,,,17 lsel,a,,,24,25 lsel,a,,,27 lsel,a,,,26 lsel,a,,,30 nsll,,1 d,all,vx,0 d,all,vy,0 alls /solu !!!! FLOTRAN Input acel,0.0,grav,0.0 FLDA,SOLU,VOF,ON FLDA,SOLU,FLOW,ON FLDA,SOLU,TRAN,ON FLDA,SOLU,TURB,ON FLDA,TIME,GLOB,3 FLDA,TIME,NUMB,50 FLDA,TIME,STEP,1e-2 FLDA,TIME,APPE,0.1 FLDA,TIME,PRES,1.0E-6 FLDA,ADVM,MOME,SUPG flda,relx,vx,0.5 flda,relx,vy,0.5 flda,relx,pres,1.0 flda,prot,dens,constant ! Constant density .... flda,prot,visc,constant ! Constant density flda,nomi,dens,rho ! Density set earlier flda,nomi,visc,mu ! Viscosity set earlier solve fini

meil32 · 发表于 2005-12-16 20:05

finish /clear
/filname,trans_test,1 /prep7
et,1,141 mp,ex,1,1 mp,kxx,2,190 mp,dens,2,2700 mp,c,2,900
x0=0 x1=15 x21=x1+0.2 x22=x21+0.3 x23=x22+1.5 x3=x23+20
thick=0.05 y0=0 y1=0.2 y2=y1+0.15 y3=10 dt=0.0001
rect,x0,x1,y0,y3 rect,x23,x3,y0,y2 rect,x23,x3,y2,y2+thick rect,x23,x3,y2+thick,y3 rect,x22,x23,y2,y2+thick rect,x22,x23,y2+thick,y3 aglue,all
k,,x1+thick k,,x21,y1 k,,x21,y1+thick
bsplin,2,13,20 bsplin,17,10,9
a,2,20,17,9 a,2,20,24,3
lsel,s,length,,0.05 lesi,all,,,4,,,,,0
lsel,s,loc,x,x0+dt,x1-dt lesi,all,,,50,10
lsel,s,loc,x,x1+dt,x22-dt lesi,all,,,10,1
lsel,s,loc,x,x22+dt,x23-dt lesi,all,,,15,-4
lsel,s,loc,x,x23+dt,x3-dt lesi,all,,,60,10
lsel,s,loc,y,y2+dt,y3-dt lesi,all,,,40,10
lsel,s,loc,x,x23 lsel,a,loc,x,x3 lsel,r,loc,y,y0+dt,y1-dt lesi,all,,,8,-3
FLST,5,5,4,ORDE,5 FITEM,5,1 FITEM,5,4 FITEM,5,7 FITEM,5,11 FITEM,5,15 CM,_Y1,LINE LSEL, , , ,P51X *GET,_z1,LINE,,COUNT *SET,_z2,0 *DO,_z5,1,_z1 *SET,_z2,LSNEXT(_z2) *GET,_z3,LINE,_z2,ATTR,NDNX *GET,_z4,LINE,_z2,ATTR,SPNX *get,_z6,line,_z2,attr,kynd *IF,_z3,GT,0,THEN *IF,_z4,NE,0,THEN LESIZE,_z2,,,_z3,1/_z4,,,,_z6 *ENDIF *ENDIF *ENDDO CMSEL,S,_Y1 CMDELE,_Y1 
alls MSHAPE,0,2D MSHKEY,1
asel,s,loc,x,x1,x23 asel,r,loc,y,y0,y2+thick mat,2 amesh,all asel,inve mat,1 amesh,all
nsel,s,loc,y,0 d,all,vy,0
nsel,s,loc,x,x23 nsel,r,loc,y,y0,y2 d,all,vx,0 d,all,vy,0
nsel,s,loc,x,x0 d,all,vx,0.8*20.05*(293**0.5) d,all,vy,0 d,all,temp,1.16*293 d,all,pres,0
nsel,s,loc,y,y3 d,all,vy
nsel,s,loc,x,x3 d,all,pres,0
lsel,s,,,8,10,2 lsel,a,,,29 dl,all,,temp,300,1 alls tunif,293 /solu
FLDATA1,SOLU,TRAN,1 FLDATA1,SOLU,FLOW,1 FLDATA1,SOLU,TEMP,1 FLDATA1,SOLU,TURB,1 FLDATA1,SOLU,COMP,1 FLDATA1,SOLU,VOF,0 FLDATA1,SOLU,SFTS,0 FLDATA1,SOLU,IVSH,0 FLDATA1,SOLU,SWRL,0 FLDATA1,SOLU,SPEC,0 FLDATA1,SOLU,ALE,0 FLDATA1,SOLU,RDSF,1 
/COM,,Transient Analysis,1 *SET,_z4,-999 *SET,_z14,1 !* FLDATA4,TIME,STEP,0.01, FLDATA4,TIME,ISTEP,0 FLDATA4,TIME,NUMB,1000, FLDATA4,TIME,TEND,1.0e06 FLDATA4,TIME,GLOB,8, FLDATA4,TIME,VX,0.01, FLDATA4,TIME,VY,0.01, FLDATA4,TIME,VZ,0.01, FLDATA4,TIME,PRES,1e-006, FLDATA4,TIME,TEMP,1e-006, FLDATA4,TIME,ENKE,0.01, FLDATA4,TIME,ENDS,0.01, FLDATA4A,STEP,OVER,10, FLDATA4,TIME,OVER,0 FLDATA4A,STEP,APPE,10, FLDATA4,TIME,APPE,1.0e6 FLDATA4A,STEP,SUMF,10, FLDATA4,TIME,SUMF,1.0e6 FLDATA4,TIME,BC,0 FLDATA4,TIME,TEND,1000000, 
/COM,,Transient Analysis,1 FLDATA12,PROP,DENS,4 FLDATA13,VARY,DENS,1 FLDATA12,PROP,VISC,4 FLDATA13,VARY,VISC,0 FLDATA12,PROP,COND,4 FLDATA13,VARY,COND,0 FLDATA12,PROP,SPHT,4 FLDATA13,VARY,SPHT,0 !* FLDATA7,PROT,DENS,AIR-SI FLDATA8,NOMI,DENS,-1 FLDATA9,COF1,DENS,0 FLDATA10,COF2,DENS,0 FLDATA11,COF3,DENS,0 FLDATA7,PROT,VISC,AIR-SI FLDATA8,NOMI,VISC,-1 FLDATA9,COF1,VISC,0 FLDATA10,COF2,VISC,0 FLDATA11,COF3,VISC,0 FLDATA12,PROP,IVIS FLDATA7,PROT,COND,AIR-SI FLDATA8,NOMI,COND,-1 FLDATA9,COF1,COND,0 FLDATA10,COF2,COND,0 FLDATA11,COF3,COND,0 FLDATA7,PROT,SPHT,AIR-SI FLDATA8,NOMI,SPHT,-1 FLDATA9,COF1,SPHT,0 FLDATA10,COF2,SPHT,0 FLDATA11,COF3,SPHT,0
!FLDA,STAB,VISC,10 FLDA,STAB,MOME,1.0 FLDA,STAB,TURB,1 FLDA,STAB,PRES,1.e-3 FLDA,METH,PRES,3 FLDA,SRCH,PRES,10 FLDA,MAXI,PRES,1000 flda,capp,pres,t flda,capp,pmin,-9.5E+4 solve

meil32 · 发表于 2005-12-16 20:06

/batch,list /filename,spec /com ** Analysis Types Laminar and Turbulent, Incompressible /com 2D - quadrilateral and triangular elements /com ** Features Thermal, Multiple Species Transport /com ** Options Dilute mixtures, composite property types (CGAS, CMIX) /com ** Variable laminar properties /com ** Turbulence /com ** Construction of geometry /prep7 !!!!!!! Define some dimensions - SI unite are used lenin=.3 half=lenin/2. width=.1 hfwid=width/2. outlen=1.2 !!!!!!! Define inlet and outlet rectangles rect,-lenin,0,-hfwid,hfwid rect,.2,.3,.25,.25+lenin rect,.2,.3,-.25,-.25-lenin rect,.4,.4+outlen,-.15,.15 !!!!!!! Lines that border the mixing area I2tan,-3,-8 I2tan,-6,-15 I2tan,-13,-10 I2tan,-12,-1 !!!!!!! Parameters defined for meshing nlcurv=16 rlcurv=1 nscurv=9 nispan=8 rispan=-1.5 nospan=13 rospan=.2 nilen=10 rilen=-2 nolen=24 rolen=4 !!!!!!! !flst,2,2,4,orde,2 !fitem,2,17 !fitem,2,20 lsel,s,,,17,20,3 lesize,all,,,nlcurv,rlcurv lsel,s,,,18,19 !fitem,2,18 !fitem,2,-19 lesize,all,,,nscurv,rscurv !flst,2,3,4,orde,3 !fitem,2,2 !fitem,2,5 !fitem,2,11 lsel,s,,,2,5,3 lsel,a,,,11 lesize,all,,,nispan,1 !flst,2,3,4,orde,3 !fitem,2,4 !fitem,2,7 !fitem,2,9 lsel,s,,,4,7,3 lsel,a,,,9 lesize,all,,,nispan,rispan !flst,2,6,4,orde,6 !fitem,2,1 !fitem,2,3 !fitem,2,6 !fitem,2,8 !fitem,2,10 !fitem,2,12 lsel,s,,,1,3,2 lsel,a,,,6,12,2 lesize,all,,,nilen,rilen lsel,s,,,13,16 lesize,13,,,nolen,rolen lesize,15,,,nolen,1./rolen lesize,16,,,nospan,rospan lesize,14,,,nospan,rospan alls !!!!!!! Define the mixing area... !flst,2,8,3 !fitem,2,2 !fitem,2,12 !fitem,2,11 !fitem,2,13 !fitem,2,16 !fitem,2,6 !fitem,2,5 !fitem,22,3 a,2,12,11,13,16,6,5,3 alls /com ** CONSTRUCTION OF THE MESH !!!!!!! Put triangles in the mixing area (5) asel,s,,,5 et,1,141 mshape,1,2d amesh,5 !!!!!!! Put a mapped mesh in the rectangles (quads) asel,s,,,1,4 mshape,0,2d mshkey,1 amesh,all /com ** BOUNDARY CONDITIONS !!!!!!! Wall boundary conditions lesel,s,,,,1,3,2 lsel,a,,,6,12,2 lsel,a,,,13,17,2 lsel,a,,,18,20 nsll,,1 d,all,vx,0 d,all,vy,0 !!!!!!! Define velocities, temperature at top, bottom, left vtop=.1 vbot=.1 vlef=.1 lsel,s,,,7 nsll d,all,vx,0 d,all,vy,-vtop nsll,,1 d,all,temp,300 lsel,s,,,4 nsll d,all,vx,vlef d,all,vy,0 nsll,,1 d,all,temp,400 lsel,s,,,9 nsll d,all,vx,0 d,all,vy,vbot nsll,,1 d,all,temp,300 lsel,s,,,14 nsll,,1 d,all,pres,0 flda,conv,iter,5 save finish alls /solu /com ** FLOTRAN INPUT flda,iter,exec,40 flda,temp,nomi,300 ! Initial temperature field is 300K flda,prot,dens,air-si ! Initial solution will be for AIR flda,vary,dens,true flda,prot,visc,air-si flda,vary,visc,true flda,prot,cond,air-si flda,vary,cond,true flda,prot,spht,air-si save solve ! Solve 40 iterations with air at 300K finish ! Prepare for species transport... /prep7 flda,prot,dens,cmix ! Composite mixture for density flda,prot,visc,cmix ! Composite mixture for viscosity keyopt,1,1,3 ! Specify that there are 3 species
flda,solu,spec,t ! Turn on solution for multiple species transport msdata,2 ! Specify species 2 (N2) as the algebraic species ! !!!!!!! Species Property Input msspec,1,o2,31.999 msprop,1,DENS,GAS,1.2998,300,1.01325E+5 msvary,1,dens,t msnomf,1,.3 msprop,1,VISC,CONSTANT,1.2067E-5 msprop,1,mdif,CONSTANT,2.149E-5 msprop,1,cond,CONSTANT,.02674 mscap,1,1 ! msspec,2,n2,28.018 msprop,2,DENS,GAS,1.1138,300,1.01325E+5 msvary,2,dens,t msnomf,2,.3 msprop,2,VISC,CONSTANT,1,786E-5 msvary,3,dens,t msnomf,3,.4 msprop,3,VISC,CONSTANT,8.94E-6 msprop,3,mdif,CONSTANT,4.964E-5 msprop,3,cond,CONSTANT,.1815 mscap,3,1 ! msrelx,1,1.0 msrelx,3,1.0 msmeth,1,3 mssolu,1,,,2,1.e-8 alls !!!!!!! Species boundary conditions lsel,s,,,7 nsll,,1 d,all,o2,1.0 d,all,n2,0.0 d,all,h2,0.0 lsel,s,,,4 nsll,,1 d,all,o2,0.0 d,all,n2,1.0 d,all,h2,0.0 lsel,s,,,9 nsll,,1 d,all,o2,0.0 d,all,n2,0.0 d,all,h2,1.0 alls !!!!!!! End of species boundary conditions flda,iter,exec,20 ! Ask for 20 global iterations flda,conv,outp,land ! Adjust convergence monitor output style save finish /solu solve ! 20 iterations with species activated ! ! Prepare for energy solution flda,solu,temp,t ! Achieve a constant flow temperature solution flda,solu,flow,f ! Freeze the flowfield flda,meth,temp3 ! Activate PCCR solver flda,conv,temp,1.e-10 ! Convergence criterion for PCCR flda,iter,exe,5 ! Need only a few iterations for solution... flda,relx,temp,1.0 ! no relaxation on temperature save solve ! ! Prepare for coupled solution
flda,iter,exec,35 ! Achieve a flow and thermal solution flda,solu,flow,t solve flda,iter,exec,50 ! Run 50 more iterations to refine solution save solve finish

yinyi · 发表于 2005-12-17 01:26

搂住可否提供例题说明

hitvip · 发表于 2005-12-28 19:36

谢谢！收下了[em02]

jamescai · 发表于 2006-1-26 10:42

谢谢楼主

hitvip · 发表于 2006-2-23 19:26

搂住可否提供例题说明

Hikki326 · 发表于 2006-3-2 13:53

全是命令啊，怎么说也得差不多给个说明啊！

zgp0816 · 发表于 2006-4-1 10:11

求示楼主加说明附件

satanwang · 发表于 2006-5-31 12:48

看不懂啊

jiong168 · 发表于 2006-5-31 14:08

谢谢

jackyfoo · 发表于 2006-6-3 20:26

真的是好东西啊 向共享广义者下跪！！！！

pengmanhua · 发表于 2006-9-1 19:43

为什么不打包放在一块呢？

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[分享]几个流体力学的例子

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回复：（meil32）[分享]几个流体力学的例子

回复：（meil32）[分享]几个流体力学的例子

谢谢

搂住可否提供例题说明