[gauthamnarayan]

I have recently tried to simulate the acceleration due to friction in the a micro channel flow. I find that even though the peak mach numbers match up with previous experiments, the jet breakdown occurs much sooner than expected.

This gives birth to the question on whether the making the grid finer near the nozzle exit and continuing till the boundary would help carry on the jet further, how influential would this be.

In my understanding, having a high aspect ratio cell would lead to more dissipation, can anyone help me in understanding how much effect would the cell aspect ratio would have on the jet breakdown.



thanks,

[FMDenaro]

Originally Posted by gauthamnarayan

I have recently tried to simulate the acceleration due to friction in the a micro channel flow. I find that even though the peak mach numbers match up with previous experiments, the jet breakdown occurs much sooner than expected.

This gives birth to the question on whether the making the grid finer near the nozzle exit and continuing till the boundary would help carry on the jet further, how influential would this be.

In my understanding, having a high aspect ratio cell would lead to more dissipation, can anyone help me in understanding how much effect would the cell aspect ratio would have on the jet breakdown.



thanks,

In any simulation, the grid refinement assessment is a good job ;-)

however, many other issues can affect the solution, such as BC.s