|June 23, 2009, 14:28||
peritalsis problem using DEFINE_GRID_MOTION
Join Date: Jun 2009
Posts: 3Rep Power: 7
i am doing a sinusoidal peristalsis problem in which the radius of the wave is given by: R(x,t)=epsilon+(a/2)(1-cos(2*pi/lambda(x-ct) . the respective values are provided. the program is supposed to take time, and x as input.
i have used a cfd as follows:
Thread *tf = DT_THREAD(dt);
real val1, val2;
/*** set deforming flag on adjacent zone ***/
/*NV_D(axis, =, 1.0, 0.0, 0.0);*/
if (NODE_X(v) > 0.000667 && NODE_POS_NEED_UPDATE (v))
val = val2;
NV_V(NODE_COORD(v), =, val);
/*NODE_Y(v) = val2;*/
i have used very small time steps, but it is still giving negative cell volume as an error at the very first step. kindly help me.
hoping for a reply.
thanx a lot
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