shock wave in very high pressure gradients
 

Hello all,

I want to simulate a shock propagation induced by a very high pressure gradient of inlet and outlet (around 1 Giga Pa).
I am using an explicit solver with first order upwind and with time steps of around 10^(-10) since I just need to model a very short time after shock initiation.
The problem is when this pressure gradient is around 10 MPa, i will have very good results but as I change it to higher pressures, it gives me these errors:

Error > (greater-than): invalid argument [2]: wrong type [not a number]
Error Object: -1.#ind

Error: WorkBench Error: Could not handle event: SolutionStatusUpdate
Error Object: #f

these errors appear after one iteration! does any body have any idea?
is fluent capable of simulating this high pressure gradients?

thanks,

I'm not kind of expert but...

1. did you checked solution limits?

2. if you reduce under-relaxtion coefficients, it might be...

3. mesh can occur problems


good luck :D

oh dear lord..

how can I delete this text?

I have checked all of this but this error appears at the first step. any idea?

how did you solve the problem?