PPT-Lecture 7: Unsteady Laminar Flow

Impulsive Shearing Motion of a Plane Wall Laminar Boundary Layers Impulsive shearing motion of a plane wall At the wall is impulsively set into motion Nonsteady planeparallel flow. 1 Friction factor for laminar 64258ow 5 1 Laminar or turbulent 64258ow The 64258ow of a 64258uid in a pipe may be laminar 64258ow or it may be turbule nt 64258ow Osborne Reynolds 18421912 a British scientist and mathematici Esco Airstream Laminar Flow Clean Bench Laminar Flow Clean Benches, Horizontal and Vertical (D-Series) 2 2 2 Airstream Horizontal Laminar Flow Clean Bench, Model AHC-4D_.Shown with optional caster wh CE30460 - Fluid Mechanics. Diogo. Bolster. Laminar or Turbulent Flow. Turbulent Flow http://. www.youtube.com/watch?v. =NplrDarMDF8. Laminar Flow http://. www.youtube.com/watch?v. =KqqtOb30jWs&NR=1. What is . OpenFOAM. ?. OpenFOAM. is a library of C++ codes that solve partial differential equations. Incompressible flow (. Navier. -Stokes). Compressible flow (. Navier. -Stokes). Solid displacement (Elasticity). Fluids can move or flow in many ways. . In . steady flow. the velocity of the fluid particles at any point is constant as time passes. . Unsteady flow. exists whenever the velocity at a point in the fluid changes as time passes. Laminar Flow in Circular Tube. : Analytical. local Nusselt number . is . constant. . in . fully develop region. depends on surface thermal condition. constant heat flux. constant surface temperature. Most of the problems encountered in engineering are of unsteady type.. Two main types of problems under unsteady conditions. The first is where the water level in a reservoir or pressure tank is steadily rising or falling so that rate of flow varies continuously but where change takes place slowly.. Indrajit Roy. , Donald E. Porter, Michael D. Bond, . Kathryn S. McKinley, Emmett Witchel. The University of Texas at Austin. Untrusted code on trusted data. Your computer holds trusted and sensitive data. LAMINAR FLOW . V.S. TURBULENT FLOW. This shows turbulence because it’s all over the place and rough. This part of the picture shows Laminar Flow because it runs very smoothly. Unsteady. Flow. Objectives. Understand unsteady flow.. Examine the unsteady . form of the Navier–Stokes . Equation.. S. tudy . the Courant Number for unsteady . flow.. Learn from an example. : Unsteady flow . In laminar flow, the fluid moves smoothly in orderly layers, with little or no mixing of the fluid across the flow stream. . With laminar flow, there can still exist changes in velocity as the friction of the wall slows the layers closest to the wall, while the flow in the centre of the pipe moves at a faster pace. . By: Lauren Cameron. Introduction. Partially penetrating wells:. aquifer is so thick that a fully penetrating well is impractical. Increase velocity close to well and the affect is inversely related to distance from well (unless the aquifer has obvious anisotropy). DESCRIBE . the characteristics and flow velocity profiles of laminar flow and turbulent flow.. DEFINE . the property of viscosity.. DESCRIBE . how the viscosity of a fluid varies with temperature.. DESCRIBE . Laminar flow cabinets for laboratories. Kewaunee’s Interceptor laminar air flow cabinet workstation are a popular choice in many laboratories.