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Full-Text Articles in Engineering
A Numerical Solution For The Turbulent Flow Of Non-Newtonian Fluids In The Entrance Region Of A Heated Circular Tube, Prapat Wangskarn, Bahman Ghorashi, Rama Subba Reddy Gorla
A Numerical Solution For The Turbulent Flow Of Non-Newtonian Fluids In The Entrance Region Of A Heated Circular Tube, Prapat Wangskarn, Bahman Ghorashi, Rama Subba Reddy Gorla
Chemical & Biomedical Engineering Faculty Publications
Numerical solutions of conservation equations are obtained for turbulent flow of non-Newtonian fluids in a circular tube. The forward marching procedure of Patankar and Spalding^1 was implemented in order to obtain the simultaneous development of the velocity and temperature fields by using the apparent viscosity of fluids. Prandtl's mixing length concept is used to determine the apparent turbulent shearing stress. Furthermore, local and average Nusselt numbers are obtained in the entrance region, as well as in the fully developed region. For the case of the fully developed region, values of the Nusselt numbers …
Heat And Momentum Transfer Analogies For The Transitional And Turbulent Flow Of A Non-Newtonian Power-Law Fluid In A Heated Pipe, Prapat Wangskarn, Bahman Ghorashi
Heat And Momentum Transfer Analogies For The Transitional And Turbulent Flow Of A Non-Newtonian Power-Law Fluid In A Heated Pipe, Prapat Wangskarn, Bahman Ghorashi
Chemical & Biomedical Engineering Faculty Publications
A model is proposed for the transfer of heat to non-Newtonian power-law fluids flowing in heated horizontal pipes. Comparisons with the existing models, based on the absolute-percent-arithmetic-average-deviation and the percent-standard-deviation, show that under the transitional and turbulent flow regimes the proposed correlation fits the experimental data more accurately over a wide range of flow behavior index and there are no restrictions for its use when applied to pseudoplastic fluids.
Mixed Convection In Vertical Internal Flow Of A Micropolar Fluid, Rama Subba Reddy Gorla, Bahman Ghorashi, Prapat Wangskarn
Mixed Convection In Vertical Internal Flow Of A Micropolar Fluid, Rama Subba Reddy Gorla, Bahman Ghorashi, Prapat Wangskarn
Chemical & Biomedical Engineering Faculty Publications
The theory of micropolar fluids due to Eringen is used to formulate a set of equations for the flow and heat transfer characteristics of the combined convection micropolar flow in vertical channels. It is found that the microstructure and substructure parameters have significant effects on the flow and thermal fields. By making the Newtonian solvent more and more micropolar, it is possible to obtain drag reduction as well as reduced heat transfer characteristics.