PPT-Chapter 7 : Convection – External Flow : Cylinder in cross flow

1 V upstream velocity approaching velocity u free stream velocity relative velocity compare to the body Chapter 7 Convection External Flow Cylinder in cross flow 2 Re. 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). For a constant property, laminar flow a . similarity solution. exists for the flow field . u. (. y. ). local boundary layer thickness. local skin friction coefficient. average skin friction coefficient. 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. in a . Low- Pressure Turbine*. Joshua Combs, Aerospace Engineering, Junior, University of Cincinnati. Devon Riddle, Aerospace Engineering, Senior, University of Cincinnati. ASSISTED BY:. Michael Cline, Graduate Research Assistant. 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 . Introduction to Convection. Convection denotes energy transfer between a surface and a fluid moving over the surface.. The dominant contribution due to the bulk (or gross) motion of fluid particles.. a. 2. = 1. Pressure, Drag and Lift for Uniform Flow Over a Cylinder. Along the cylinder, . r. = . a. ,. the velocity components become:. u. θ. is maximum at . θ. = . π. /2 and 3 . π . /2; zero at . Free Convection (or Natural Convection). fluid motion . induced by . buoyancy forces. buoyancy forces . arise when there are . density gradients . in a fluid and a . body force. . proportional to density arises . Network Flow Models. Transportation Models. (Flow, Cost). [External Flow]. [2]. [4]. [3]. [-3]. [-3]. [-3]. (3,3). (1,1). (0,4). (2,2). (3,3). (0,3). (0,4). 1. 2. 3. 4. 5. 6. Transportation Models. (Flow, Cost). effects of terrain on . precipitation. The wind began to blow steadily out of the west and pour the water of the distant seas on the dark heads of the hills . … . J.R.R. Tolkien, The Lord of the Rings. 1. Aim : . develop an appreciation for the physical phenomena associated with internal flow and to obtain convection coefficients. Contents:. Entrance region . vs. fully developed region. Hydrodynamic effect consideration. 1. Aim : . develop an appreciation for the physical phenomena associated with internal flow and to obtain convection coefficients. Contents:. Entrance region . vs. fully developed region. Hydrodynamic effect consideration. Quantifying Heat Advection by Groundwater Flow in the Active Layer - Laboratory Simulations - S. Veuille 1,2 , M. Verpaelst 1,2 , S. Charbonneau 1 , K. Grandmont 1,2 , D. Fortier 1,2,3 1 Geography in a . Low- Pressure Turbine*. Joshua Combs, Aerospace Engineering, Junior, University of Cincinnati. Devon Riddle, Aerospace Engineering, Senior, University of Cincinnati. ASSISTED BY:. Michael Cline, Graduate Research Assistant.