Abstract
Calculations have been performed for fully developed turbulent flow and heat transfer in a square duct with one roughened wall. This paper focuses on the application of three algebraic models of the turbulent heat flux transport equation to predict turbulent heat flux component behavior. The pressure-temperature gradient term is simulated by means of three models: one a composite based on the "slow" and "rapid" interaction models proposed by Lumley and Launder, respectively, and another model proposed by Shih and Lumley and the other model proposed by Craft and Launder. These three models lead to predict mean temperature distributions in the duct cross plane that are in relatively good agreement with experimentally measured distributions. Calculated turbulent heat flux component distributions in the cross plane show that all models predict experimentally observed features in the flow, without the Craft and Launder model providing the best overall accuracy.
