Convective heat transfer for a wavy channel based on compressible Navier-Stokes equations

• Main Authors: Ching-Sheng Liao, 廖經勝
• Other Authors: Yi-Lung Yang
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/24257785890836856570

碩士 === 中華大學 === 機械工程學系碩士班 === 99 === A convective heat transfer in a wavy channel was studied based on compressible Navier-Stokes equations. The conservative form of the governing equations was solved by the high-order differential scheme. The numerical results show a good agreement with the previous solutions. Different inlet Reynolds number, inlet Mach number, temperature difference, amplitude of waviness and arrangement of the wavy walls were investigated. The isothermal contour, pressure coefficient, friction coefficient, local Nusselt number and mean Nusselt number were used to elucidate the heat gain and pressure drop through the channel. The larger the Reynolds number as well as the temperature difference the rate of heat transfer is increased. For a large amplitude of wavy walls or a different arrangement of the top and the bottom walls raises the rate of heat transfer slightly at a significant cost of pressure drop. The larger the inlet Mach number, the smaller the Nusselt number and a larger friction drag.