Numerical Simulation of Turbulent Flow in Annulus with Rotation of an Inner Cylinder in High Angular Speed

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Asgarshamsi, Abolhassan | 2008

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 39135 (08)
University: Sharif University of Technology
Department: Mechanical Engineering
Advisor(s): Farhanieh, Bijan
Abstract:
In this thesis velocity and temperature fields of concentric cylinders with rotation of inner wall have been investigated numerically. Air enters the gap between cylinders and attains fully developed in both velocity and temperature fields after certain lengths. Adiabatic and constant heat flux boundary conditions have been applied and Nusselt number was calculated. In order to analyze the variations of velocity and temperature fields, different angular velocities at constant axial Reynolds number and different axial velocities at constant angular velocity have been investigated. The turbulent stresses were approximated with k ?? model. Results show that for high values of angular velocity, Nusselt number increases at the outer wall and also, by increasing the axial Reynolds number the temperature decreases on inner and outer wall
Keywords:
Numerical Simulation ; Turbulent Flow ; Angular Velocity ; Nusselt Number ; Concentric Cylinder ; Taylor Number

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