Development of Numerical Methods for Turbulent Flow in Complex Rotating Systems
Doctoral thesis, 1992

A computer code has been developed to predict three-dimensional incompressible turbulent flow in complex rotating geometries. The application in mind is turbomachinery in general. However such a code is able to treat a large number of problems in fluid mechanics. The code has evolved gradually, so numerical methods are presented for computing laminar flow, turbulent flow using the k-e model, turbulent flow using a full Reynolds stress turbulence model which includes the effect of a rotating frame of reference. Some work has been done to reduce numerical diffusion. Free-stream induced transition from laminar to turbulent flow is computed. Wall boundary layers has been treated with wall-functions as well as with a low Reynolds number version of the full Reynolds stress turbulence model where the boundary layer is resolved. The numerical formulation is based on control-volumes and uses structured grids in a general non-orthogonal coordinate system. Both formulations with staggered and non-staggered velocities have been used in this work. Test cases are; Rotating Couette flow, flow in a pipe with a constriction, Jeffery-Hamel flow, uniform flow using a cylindrical mesh, flow inside a channel with a smooth expansion, flow in a ventilated room with inclined floor, flow in a cascade, driven cavity flow, flow over a rotating/non-rotating backward facing step, flow in a rotating/non-rotating channel, flow over a plate where transition occurs.

fluid mechanics

computer code

rotating geometries



Peter Hedberg

Chalmers, Department of Thermo and Fluid Dynamics

Subject Categories

Mechanical Engineering

Physical Sciences



Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie: 894

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