internal combustion engines with FLUENT
Hi:
I'm trying to simulate an internal combustion engine, with FLUENT, but I don't obtain convergence for the pressure.. I thought that perhaps FLUENT is not prepare to work with compressible flows, because all of the examples they gave are with entrances and outlets defined perfectly. the simplified ICE I tryed to simulate was a rectangle, with one entrance to fuel, another to ar and one outlet. and they have boundary conditions varying with time. really I don't get anything.. Is there anybody that get something and how?? thanks a lot |
Re: internal combustion engines with FLUENT
I have been working with fluent 4 and fluent 5 for about a year simulating scram jet combustion chamber. 2d and 3d. I have always had a difficult time obtaining convergence for pressure. It is extemely grid dependent. I have found that using a low underrelaxation approx 0.2 for velocity and pressure help also. Ussually i use 0.5 for species,viscosity, etal.
any more questions please email me at melolyn@hotmail.com |
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