[Nagisa]

Hi guys, I'm trying do some runs with my blunt body, to measure heat flux on it. The geometry is show in the picture below:
https://ibb.co/Q8F2LQ4
The x axes boundary was set as a symmetry condition, the problem right now is defining inlet and outlet, or that's basically what I think xD. My runs are at very high number of machs (M = 26 about). After 20k iterations on top of the body, where there is an high curvature that end up with the boundary "outlet", fluent gives me an absolute pressure value issue, and shortly after I got NaN xD. I guess the problem is that I defined the right wall as outlet, and when the shock shape is forming it can't no more guarantee the outlet condition and happens what I've described. I mean I'm supposing that, not sure about that. What should I do ? Is there something completely wrong ? Should I change geometry ?

[mCiFlDk]

Hi Nagisa,


First of all, I'd appreciate if you could explain us why the geometry was done in that way. Normally, blunt body analyses (or CFD analyses in general) use a bigger domain due to its nature. Correct me if I'm wrong, but I think your domain should be like in Fig. 1.


The problem with the pressure and any related errors can be produced because the domain must be correctly implemented, so that the flow can be completely developed. Before doing any step, you need to understand geometry and domain creation within a CFD problem.


Regards