fluent中uds的对流项
小弟最近在做电弧双温模型,两个能量方程都是通过uds写的,程序写好后导入fluent计算几千步就发散了,速度入口附近的速度和压力变得非常大,怀疑是对流项的问题,但是不太会修改,请各位大大帮忙看一下,万分感激!小木虫里不会发图片,发不了公式,这里先附上我的代码:
DEFINE_UDS_FLUX(uds3_flux, f, t, i)
{
cell_t c0, c1 = -1;
Thread *t0, *t1 = NULL;
real NV_VEC(psi_vec);
real NV_VEC(V);
real NV_VEC(A), flux = 0.0;
real ke = 1.38e-23;
c0 = F_C0(f, t);
t0 = F_C0_THREAD(f, t); //内部面,气体流入的为C0,流出为C1。边界面上只有C0没有C1
F_AREA(A, f, t);
/* If face lies at domain boundary, use face values; */
/* If face lies IN the domain, use average of adjacent cells. */
if (BOUNDARY_FACE_THREAD_P(t)) /*Most face values will be available*/
{
real dens;
/* Depending on its BC, density may not be set on face thread*/
if (NNULLP(THREAD_STORAGE(t, SV_DENSITY)))
{
dens = edensity(F_UDSI(c0, t0, 3), F_UDSI(c0, t0, 4)); /* Set dens to face value if available */
C_UDMI(c0, t0, 16) = edensity(F_UDSI(c0, t0, 3), F_UDSI(c0, t0, 4));
}
else
{
dens = edensity(C_UDSI(c0, t0, 3), C_UDSI(c0, t0, 4)); /* else, set dens to cell value */
C_UDMI(c0, t0, 17) = edensity(C_UDSI(c0, t0, 3), C_UDSI(c0, t0, 4));
}
psi_vec[0] = F_U(f, t)*2.5*dens*ke;
psi_vec[1] = F_V(f, t)*2.5*dens*ke;
/*NV_DS(psi_vec, =, F_U(f,t), F_V(f,t), F_W(f,t), *, dens*ke);*/
flux = NV_DOT(psi_vec, A); /* flux through Face */
}
else
{
c1 = F_C1(f, t); /* Get cell on other side of face */
t1 = F_C1_THREAD(f, t);
psi_vec[0] = C_U(c0, t0)*2.5*ke*edensity(C_UDSI(c0, t0, 3), C_UDSI(c0, t0, 4));
C_UDMI(c0, t0, 18) = C_U(c0, t0)*2.5*ke*edensity(C_UDSI(c0, t0, 3), C_UDSI(c0, t0, 4));
C_UDMI(c1, t1, 19) = C_V(c1, t1)*2.5*ke*edensity(C_UDSI(c1, t1, 3), C_UDSI(c1, t1, 4));
psi_vec[1] = C_V(c1, t1)*2.5*ke*edensity(C_UDSI(c1, t1, 3), C_UDSI(c1, t1, 4));
flux = NV_DOT(psi_vec, A)/2.0; /* Average flux through face */
C_UDMI(c0, t0, 23) = flux;
}
/* ANSYS Fluent will multiply the returned value by phi_f (the scalar’s
value at the face) to get the ‘‘complete’’ advective term. */
C_UDMI(c0, t0, 24) = flux;
return flux;
}@wuming524 返回小木虫查看更多
我用的帮助文档上一模一样的UDF也发散了
没有此uds方程的功能描述,或控制方程哈
你的问题解决了吗?我也在做双温度电弧仿真,能否交流一下,我的qq402051227
请问你也做过双温度电弧吗?做过的话可以加我QQ1326227455有偿请教下吗
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