CHT'01 validation exercise: Natural convection in an air filled cavity

The paper presents calculations of a benchmark problem using the CFD code CFX-4 and the comparison with published experiments. The benchmark comprises the calculation of natural convection in a air-filled cavity with differentially heated walls. The experiments were performed for different orientations of the heated and cooled faces. The calculated Nusselt numbers correspond quite well to the experimental results. The steady state problem was approached by transient calculations. Not for each test case a stable final solution was found. In those cases the correspondent time averaged values were close to the experiment.