Heat and Mass Transfer Australasia

ISBN Print: 978-1-56700-099-3

Numerical Simulation Of Buoyancy Induced Flows In Sealed Rotating Cavities

DOI: 10.1615/978-1-56700-099-3.100
pages 73-80

Аннотация

A direct numerical simulation approach is adopted to predict the flow and temperature distribution in a sealed rotating cavity with a radially applied temperature gradient where the outer cylindrical wall is uniformly heated and the inner wall is uniformly cooled. Two dimensional radial/axial and radial/circumferential flows are considered.
First, linear stability theory is used to predict the conditions necessary for the onset of strongly convecting flow. Then, numerical simulations of the unsteady flow regime are undertaken in order to assess fully the dependence of the rate of heat transfer on the Rayleigh and rotational Reynolds numbers. Steady convection is found to give way to periodic flow and then to a chaotic regime as the Rayleigh number is increased. Increasingly large values of the rotational Reynolds number are found to inhibit increasingly the onset of strongly convecting flow and its subsequent strength at higher Rayleigh numbers.