Calculation of Heat Transfer in a Radially Rotating Coolant Passage

Abstract

The three-dimensional flow field and heat transfer in a radially rotating coo/anl passage are studied numerically, The passage chosen has a square cross section with smooth isothermal walls of finite length. The axis of rotation is normal to the flow direction with the flow rndially outward. The effects of Coriolis forces, centrifugal buoyancy, and fluid Reynolds number on the flow and heat transfer hove all been considered. The analysis has been performed by using a fully eUiptic, three-dimensional, body-fitted computational fluid dynamics code based on pressure correction techniques. The numerical technique employs a mulJigrid iterative solution procedure and the stondard k -e turbulence model for both the hydrodynamics and heat transfer. The effecl of rotation is included by considering the governing equations of motion in a relative frame of reference /hot moues with the passage.The consequence of rotation is to bring higher velocity fluid fram the core to the trailing surface, thereby increasing both the friction and heat transfer at this face. At the same time, the heat transfer is predicted to decrease along the leading surface. The effect ofbuoyaney is to increase the rndial velocity of the fluid, thus generally increasing the heat transfer along both the leading and trailing surfaces. These effects and trends /hot hove been predicted are in agreement with experimental heat transfer data available in the literature 0,21. The quantitative agreement with the data was also found to be quite satisfactory.

Large eddy simulation of turbulent heat transfer in stationary and rotating square ducts

“…Most numerical studies on rotating turbulent duct flows were based on the RANS methods, for example, the work of Iacovides and Launder (1991), Zerkle (1992), Tekriwal (1994), Tolpadi (1994), Bo et al (1995), Dutta et al (1996), Hwang et al (1998), Lin et al (2001) and Belhoucine et al (2004). Relatively few DNS or LES studies are available.…”