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Flow and Heat Transfer between Two Cylinders with Internal Rotation

Kaviani, Reza | 2017

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 49664 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Noori Boroujerdi, Ali
  7. Abstract:
  8. The objective of this project is numerical simulation of air flow and heat transfer between two horizontal concentric cylinders with rotation of inner cylinder and inertia of outer cylinder grooves on the inner cylinder. In this study, the air, meanwhile rotational motion by the inner cylinder will enter into the annular space between two cylinders with certain flow rate. It can be mentioned to cooling of power plant generators, Electric motors and rotating machines among usages of air flow between two cylinders. In this article the objective is calculation of pressure drop and Nusselt number, temperature distribution on the inner cylinder under conditions of constant temperature of cylinders and comparison of it with the case which there is no groove on the cylinder. The governing equations involve conservation equations of mass, momentum with equation of energy. Numerical solution of governing equations is based on compact upwind finite difference method time III. In this pattern, the analysis of flux difference is used for derivatives of displacement phrases in each node based on difference of adjacent areas’ flux. To increase the accuracy of viscosity phrases it can be used of high degree central compression’s discretization. Meanwhile, it will be used to determine the pressure from artificial compressibility in the equation of mass conservation for changing equations to the kind of hyperbolic one. This will actually help pressure correction equation that is commonly used in solving the Navier-Stokes incompressible equations
  9. Keywords:
  10. Numerical Solution ; Rotating Cylindrical Shell ; Numerical Simulation ; Concentric Cylinder ; Grooved Cylinder ; Flux Difference Splitting

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