Unresolved Issues

  • David Roos Launchbury
Part of the BestMasters book series (BEST)


During the course of this work a few issues have surfaced concerning solver stability. The implementation of the new pressure-velocity coupling scheme has delivered excellent results in the channel, square cylinder and ribbed channel cases but has lead to solver divergence in the film cooling simulation. The velocity values inside the cooling hole were increasing beyond the stability limit given by the CFL condition, therefore causing the simulation to abort. This phenomenon could be observed on different grids and even at very low timesteps which lead to the conclusion that it is not just a matter of stability but a bug in the code.

Copyright information

© Springer Fachmedien Wiesbaden 2016

Authors and Affiliations

  1. 1.CC Fluid MechanicsandHydro MachinesLucerne Univ. of Applied Sciences & ArtsHorwSwitzerland

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