Numerical analysis of thermally developing flow in an elliptic duct with internal fins
Conference
Dong, ZF, Ebadian, MA. (1990). Numerical analysis of thermally developing flow in an elliptic duct with internal fins
. American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD, 144 39-46.
Dong, ZF, Ebadian, MA. (1990). Numerical analysis of thermally developing flow in an elliptic duct with internal fins
. American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD, 144 39-46.
The thermally developing laminar forced convection flow and heat transfer characteristics in elliptic tubes with four longitudinal internal fins is numerically investigated in this paper via the boundary fitted coordinate system. The control volume based finite difference technique is applied to obtain the solution utilizing the numerically, generated boundary fitted coordinate The elliptic tubes are maintained at a uniform wall temperature, peripherally, as well as axially. As the fins are considered to be continuous and of zero thickness, the results presented are in terms of isotherms, variation of bulk temperature, and Nusselt number in the entire thermal region of the elliptic duct for various values of relative fin heights. Also studied and graphically illustrated, is the effect of minor-axis to major-axis ratios in the elliptic duct with internal fins on the fully developed and developing heat transfer characteristics. For the special case of a circular duct, the results are compared with some limited findings in the literature and excellent agreement is obtained. Furthermore, the results exhibit a high heat transfer coefficient, expected in the entrance region, approaching asymptotically fully developed values at greater axial distances. The significance of each curve is also discussed in detail.
