Work

Towards an Improved Wall Function Formulation for Reynolds‐Averaged Navier–Stokes Simulations of Turbulent Concentric Coaxial Pipe Flows

Year: 2025

Type: article

Abstract: ABSTRACT Concentric coaxial (annular) pipe flow is numerically investigated using a high Reynolds number (HRN) Reynolds‐Averaged Navier–Stokes (RANS) approach, given direct numerical simulation (DNS) boundary conditions. Previous work has shown that traditional wall models fail in predicting bulk quantities due to insufficient representation of the inner wall. The main objective is to assess the suitability of RANS for prediction of the flowfield if a wall function that captures the effect of the inner wall spanwise curvature at small radius ratios is provided. As a starting point, the mixing length model is used as the RANS turbulence model. The results suggest that while improved mean flow statistics can potentially be obtained, an accurate wall model representation is insufficient for capturing the mean flow in terms of the location of the velocity maximum properly.

Source: PAMM

DOI: 10.1002/pamm.70025

Authors: Li Toong Yap, Juan A. Medina Méndez, Marten Klein, Heiko Schmidt

Institution: Brandenburg University of Technology Cottbus-Senftenberg

Language: English

Topic: Fluid Dynamics and Turbulent Flows

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,090

Funder: Australian Government