01 What
Modelled a double-pipe heat exchanger in ANSYS to see how far a hot stream cools and a cold stream warms as they pass each other through the pipe wall. I took ownership of the whole model, from the zones and mesh to the solution and the checks that proved it had settled.
02 How
- 01Built the four zones of the model: the hot fluid, the cold fluid, and the inner and outer pipe walls.
- 02Meshed with hex and mixed cells, then checked orthogonal quality and aspect ratio zone by zone before solving.
- 03Solved flow and energy together with a turbulence model, tracking every residual as the solution developed.
- 04Monitored the hot and cold outlet temperatures until both settled, rather than trusting the residuals alone.
03 Result
- -Successfully measured the outlet temperature of both streams and showed each settling to a steady value.
- -From those outlet temperatures, derived how far the hot stream cooled and the cold stream warmed.
- -Reached convergence with every residual meeting its criterion, on a mesh that passed the quality checks.
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