[FlowMe]

Hi,

I am modeling the mixture of methane being injected into an intake track for a small 3 cylinder diesel engine using the multi-component flow feature.

I used the tutorial as my guide to set it up correctly. However, I originally had it set up to do Mass flow inlet (instead of velocity inlet) for both my air inlet and my gas inlet. And I had flow-split outlet for the three outlets of my intake manifold.

I used the given number (in the tutorial) for the dynamic viscosity (1.175E-5 Pa-s) of the methane gas. After everything was set up and I went to run it, it gave me a lengthy error that pretty much said the viscosity value wouldn't work. So I thought, that makes sense, my pressure and temperature is different than in the tutorial. I calculated a rough value for the current viscosity and it still gave me the same error.

I played around with a few different values thinking I just didn't calculate it right and then it started giving me this error "error a floating point exception occurred: floating point exception [invalid operation]".

So then I tried setting up the inlets as a velocity inlet (as done in the tutorial, with my calculated velocities and temperatures, not those used in the tutorial) with flow split outlets, and I got the same error. I tried again with with the dynamic viscosity value they gave; same error.

I tried again with velocity inlets, and a Pressure Oulets, just as the tutorial is...same error.

I'm a noob and have run out of things to try. Could it really be just a wrong dynamic viscosity number causing problems? Something else I need to do?

thanks alot!

Matt