Numerical prediction of turbulent heat transfer in a rotating square duct with variable rotational buoyancy effects

A two equation turbulence model was used to predict heat transfer in a rotating square channel The duct is smooth and the flow is radially moved outward. Predictions of local heat transfer of the leading and trailing sides are compared with the experimental data. Test cases with different Reynolds numbers and rotation numbers are considered. The momentum equations are expanded to include Coriolis forces and the centrifugal buoyancy force. Different temperature settings at the four walls of the duct varied the temperature gradients at the four walls of the duct varied the temperature gradient in the fluid and so generated different centrifugal buoyancy levels in the rotating flow. Previous experimental data on fluid flow measurements were avaiable only for unheated ducts.

American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD

Numerical prediction of turbulent heat transfer in a rotating square duct with variable rotational buoyancy effects Conference Paper