[en] This paper discusses the results from a study conducted using different low turbulence Reynolds number models for the prediction of wall heat transfer downstream of an abrupt pipe expansion. The computer program that was used for the present study was developed from the well know TEACH code for computing elliptic flowfields. The code in the present form solves the compressible form of the full Navier-Stokes equations including the energy equation. Hence it is possible to calculate wall heat transfer under conditions that closely resemble those in combustion chambers. Low turbulence Reynolds number models of other authors implemented in the present computations