Understand what is happening inside
Jets, recirculation, temperature, species, pressure or interfaces — only the fields that answer your question.
The problem may be anything: a new design, unstable operation, excessive pressure loss, overheating, mixing, phase change, model verification or a comparative study. The physics and methodology are selected around the project objective.
Jets, recirculation, temperature, species, pressure or interfaces — only the fields that answer your question.
Geometry, operating regime, flow rate, thermal load, feed arrangement or another design variable.
Convergence, balances, mesh sensitivity and comparison with experimental or operating data.
Not a collection of images, but a cause-and-effect argument: what matters, how much, and which option is more defensible.
For a first discussion, send CAD or a drawing, working fluids, operating conditions and the engineering question. If the problem looks nothing like the cases above, that is completely fine.
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