[kaazto28]

Hi,
I am doing the analysis of the melting of PCM in heat exchanger. First I created 511000 mesh using ANSYS 17.2 student. 0.006 time step, 10 max iteration/time step, using 3000 seconds solved in 40 days.

I think, result is partially false because The PCM consists of tetra and hex. Due to the hexa mesh, the melt becomes regular. The residual x,y,z, contiunity and energy are in a straight line. Whenever I increase time step, the residual become like this;



I started an analysis again. This time I am using ANSYS 17.0 crack. I made 1000 000 mesh. Now the melting is getting better.

The most important problem is this. The processor is using 20% and the RAM is 3.7gb.
my system i7 2630qm 2.00ghz 4 cores 8 threads, 8gb ram.
Why not use all of the processor?

simulation 1; 500 000 mesh 19 iteration/minute, It solves 165 seconds in 24 hours. it finished

simulation 2; 1000 000 mesh 4 iteration/minute, It solves 35 seconds in 24 hours.
it is continuing. now 75 second



I need about 40-50 minute simulation.

relaxtion factor. pressure 0.5 momentum 0.5 energy 0.75
courant number: 1=(U*t)/x

velocity x y z>>>>converge passive
contiunity and energy>>> 0.001 0.00001>>>>converge active

Please help me. What should I do?