Abstract
Direct numerical simulation of a spatially evolution flat-plate boundary layer transition process at free stream Mach number 0.5 is performed. The inflow is specified by laminar flow profile with imposed eigenmodes of two-dimensional and three dimensional Tollmien-Schlichting (T-S) waves. The parallel computation is accomplished through the Message Passing Interface (MPI) together with domain decomposition in the streamwise direction. H-type transition scenario is represented in the result of numerical simulation. Vortical structures formed by TS-waves and events at late stages of transition in wall boundary shear layers are investigated. Λ - (horseshoe-) vortices, Λ -shaped high-shear layers, and trains of ring-like ( Ω -, hairpin-) vortices are studied. These vortical structures are similar with which has been found in K-type transition scenario. The purpose of this DNS study is to understand the physics of the late transition stages. Many remaining questions related to the late stages of flow transition have been answered by this DNS study. Nomenclature ∞ M = Mach number Re = Reynolds number in δ = inflow displacement thickness w T = wall temperature
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
