Modelling of three-dimensional jet array impingement and heat transfer on a concave surface

The standard, log-law based, form of wall-function is found to be inadequate in predicting the heat-transfer, and a more advanced form developed at Manchester (the AWF) is also tested. The exact way in which convective terms are approximated in this latter approach is shown to be crucial, and a form is presented which leads to stable and reasonably accurate solutions that capture the overall pattern and impingement Nusselt number levels shown in measurements, but underpredict heat transfer levels around the jet downwashes.