An Assessment of Detached-Eddy Simulations of Unsteady Crosswind Aerodynamics of Road Vehicle
2011 (English)In: Flow Turbulence and Combustion, ISSN 1386-6184, E-ISSN 1573-1987, Vol. 87, no 1, 133-163 p.Article in journal (Refereed) Published
An extensive study of the mesh requirements when simulating unsteady crosswind aerodynamics for industrial applications is conducted and reported in this article. Detached-Eddy Simulations (DES) of a simple car geometry under headwind, steady crosswind and time-dependent wind gust are analysed for different meshes and flow cases using a commercial software, STAR-CD. The typical Reynolds number of the cases studied is 2.0x106 based on the vehicle length. Mesh requirements for capturing the time development of the flow structures during a gust is provided. While respecting these requirements, the aerodynamic coefficients can be reliably calculated. Using turbulence methods like DES in order to resolve the flow scales provides a significant insight for designing a ground vehicle and, due to the reasonable computational times involved, can be incorporated in a design process in a near future.
Place, publisher, year, edition, pages
2011. Vol. 87, no 1, 133-163 p.
Unsteady crosswind aerodynamics, Detached-Eddy Simulation, Wind gust, Mesh, Vehicle aerodynamics
Vehicle Engineering Fluid Mechanics and Acoustics
IdentifiersURN: urn:nbn:se:kth:diva-11323DOI: 10.1007/s10494-011-9333-4ISI: 000291661700006ScopusID: 2-s2.0-79959308216OAI: oai:DiVA.org:kth-11323DiVA: diva2:273712
ProjectsECO2 crosswind stability and unsteady aerodynamics
FunderSwedish e‐Science Research CenterTrenOp, Transport Research Environment with Novel Perspectives
QC 20101012 Updated from submitted to published.2009-10-232009-10-232012-06-12Bibliographically approved