Three dimensional laminar non-Newtonian fluid flow and heat transfer in the entrance region of a cross-shaped duct
- Isfahan Univ. of Technology (Iran, Islamic Republic of). Dept. of Chemical Engineering
Many important industrial fluids are non-Newtonian in their flow characteristics. These include food materials, soap and detergent slurries, polymer solutions and many others. In the most of the industries such as polymer, foods, petrochemical the heat exchanger is an especially important component of the processing equipment. In the design of heat exchanger, the prediction of the heat transfer coefficient plays a key role as a design factor. Here the Galerkin finite element is used to solve the three dimensional momentum and energy equations for laminar non-Newtonian flow in cross-shaped straight duct. Both flow and heat transfer develop simultaneously from the entrance of the channel. Uniform wall temperature (T) and also constant wall heat flux both axially and peripherally (H2) are used as thermal boundary conditions. The power-law model is chosen to characterize the non-Newtonian behavior of the fluid. The effect of power-law index and geometric parameter on the apparent friction factor as well as Nusselt number are presented and discussed.
- OSTI ID:
- 562023
- Journal Information:
- International Communications in Heat and Mass Transfer, Vol. 24, Issue 7; Other Information: PBD: Nov 1997
- Country of Publication:
- United States
- Language:
- English
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