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69 Laminar amp Turbulent Boundary Layer Fluid amp Particle Mechanics
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=W9cml_JyIIc
Welcome to 'Fluid and Particle Mechanics' course ! • This lecture delves deeper into the distinctions between laminar and turbulent boundary layers, revisiting key concepts and providing visual evidence from experiments. It begins by restating the observation that the pressure gradient across the boundary layer is negligible compared to the pressure gradient along the boundary layer, implying that the pressure gradient outside the boundary layer dictates the pressure gradient within the boundary layer. The lecture then revisits the simplification of the governing equations at the wall, highlighting that the second derivative of velocity at the wall is determined by the pressure gradient outside the boundary layer. It emphasizes that analyzing the sign of the second derivative of velocity provides insights into the shape of the velocity profile and the occurrence of flow separation. The lecture then categorizes different flow scenarios based on the pressure gradient (favorable, zero, adverse) and the behavior of the free stream velocity (increasing, constant, decreasing), linking these categories to specific flow situations like contraction, uniform flow, and expansion. • NPTEL Courses permit certifications that can be used for Course Credits in Indian Universities as per the UGC and AICTE notifications. • To understand various certification options for this course, please visit https://nptel.ac.in/courses/103106158 • #FluidMechanics #BoundaryLayer #LaminarBoundaryLayer #TurbulentBoundaryLayer #PressureGradient #VelocityProfile #FlowSeparation #Contraction #Expansion
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