Work

Linear model for secondary motions in stratified flows

Year: 2025

Type: article

Abstract: The valley-mountain arrangement excites secondary vortices when interacting with the atmospheric boundary layer. In this paper we develop an analytical model to predict these secondary vortices in the case of thermal stratification. The model was compared to recent direct numerical simulations available in the literature which studied secondary motions in channel flow for a wide range of Reynolds and Richardson numbers. The model showed robust performance for the range of cases considered, showing error less than 5% for the temperature and below 20% for velocity in most cases.

Source: Physical Review Fluids

DOI: 10.1103/physrevfluids.10.014605

Authors: Abdelhalim Abdeldayem, Thijs Bon, Raúl Bayoán Cal, Johan Meyers

Institutions: Portland State University, KU Leuven

Language: English

Topic: Fluid Dynamics and Turbulent Flows

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funder: Fonds Wetenschappelijk Onderzoek

Award: Development of roughness models for multiscale topography in neutral and stable atmospheric boundary layers