Fluid flow and conjugate heat transfer in a matrix of surface-mounted cubes: A PANS study

• The PANS method is validated on predictions of a fluid flow and a heat transfer (not done up to now).
• The near wall PANS ζ-f model is successfully used in conjunction with the universal wall treatment.
• The PANS ζ-f significantly improves results compared to the RANS ζ-f model.
• The calculation procedure, which can be applied for any complex case, is presented.
• The possible improvements of the PANS model and the on-going work are briefly outlined.

The Partially-Averaged Navier–Stokes (PANS) method is intended to provide the optimum fidelity on any given numerical grid while varying seamlessly between the Reynolds-Averaged Navier–Stokes (RANS) model and direct numerical simulation (DNS). This method belongs to so called bridging or seamless methods. The PANS method has been more often used in the research community but also in the industry in last years. This is probably due to its simplicity, robustness and recent theoretical extensions as well as due to the detailed validations on the number of complex cases presented in many publications. As for any relatively new modeling approach, the list of validation cases should be further extended. Therefore, an additional test case is included in this paper. The PANS method is validated here for the fluid flow and heat transfer in a matrix of surface-mounted cubes. The ζ-f variant of PANS was used and compared with its RANS counterpart. The calculation procedure, which now includes the energy equation as well, is explained. A brief description of on-going developments and possible next improvements is also given in this paper.