[求助]一个关于自然对流的问题

sophiejunjun

问题描述如下：一个长为14m，宽为3.8m的矩形，里面乘有钢液，上边给恒温1550c，其他三边对流换热系数为200，温度为30c。是瞬态流动，求10s后流场和温度场。
钢液密度为7800，允许随温度变化，D0＝7800，D1＝300，D2＝0。0001，D3＝0。钢液粘度为0.005，导热系数为46，比热为787,这三项不随温度变化。
谢谢，等各位回音。
我计算出来的流动全部是向上流的，根本不对，现在很着急，希望各位帮忙

heyifeng2005

我也是做这方面的

sophiejunjun

太好了，能不能讨论一下，我想问一下，如果直接对流体建模，是不是不能在流体边界上加对流换热系数和热通量的边界呢？
下面是我求解部分的命令流，能帮我看看吗？
FLDATA4,TIME,STEP,2,
FLDATA4,TIME,ISTEP,0
FLDATA4,TIME,NUMB,1.0e06
FLDATA4,TIME,TEND,10,
FLDATA4,TIME,GLOB,20,
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,0
FLDATA4,TIME,OVER,0,
FLDATA4A,STEP,APPE,0
FLDATA12,PROP,DENS,2
FLDATA13,VARY,DENS,1 密度可以随温度变化
FLDATA12,PROP,VISC,0
FLDATA13,VARY,VISC,0
FLDATA12,PROP,COND,0
FLDATA13,VARY,COND,0
FLDATA12,PROP,SPHT,0
FLDATA13,VARY,SPHT,0
FLDATA7,PROT,DENS,LIQUID
FLDATA8,NOMI,DENS,7000,
FLDATA9,COF1,DENS,300,
FLDATA10,COF2,DENS,0.0001,
FLDATA11,COF3,DENS,0,
FLDATA7,PROT,VISC,CONSTANT
FLDATA8,NOMI,VISC,0.006,
FLDATA9,COF1,VISC,0
FLDATA10,COF2,VISC,0
FLDATA11,COF3,VISC,0
FLDATA12,PROP,IVIS
FLDATA7,PROT,COND,CONSTANT
FLDATA8,NOMI,COND,46,
FLDATA9,COF1,COND,0
FLDATA10,COF2,COND,0
FLDATA11,COF3,COND,0
FLDATA7,PROT,SPHT,CONSTANT
FLDATA8,NOMI,SPHT,787,
FLDATA9,COF1,SPHT,0
FLDATA10,COF2,SPHT,0
FLDATA11,COF3,SPHT,0
ACEL,0,-9.81,0,
FLDATA15,PRES,REFE,101350,
FLDATA16,BULK,BETA,1e+015,
FLDATA17,GAMM,COMP,1.4,
FLDATA14,TEMP,NOMI,1500,
FLDATA14,TEMP,TTOT,293,
FLDATA14,TEMP,BULK,20,
TOFFSET,273,
FLDATA18,METH,TEMP,1
FLDATA19,TDMA,TEMP,100,
FLDATA18,METH,PRES,1
FLDATA19,TDMA,PRES,100,
SOLVE