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Transient Conjugate Heat Transfer in a Circular Duct for Power-Law Fluid with Viscous Dissipation

Briggs, Alan L. (2004) Transient Conjugate Heat Transfer in a Circular Duct for Power-Law Fluid with Viscous Dissipation. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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The study of unsteady forced convection heat transfer in tubes imposed to cyclic variations has been motivated by heat exchanger applications. This study investigates the heat transfer behavior associated with a thermal transient in a forced convection. In this analysis, the effects of the duct wall heat capacity and convection from the ambient are considered, while axial conduction is neglected. The fluid inlet temperature is varied periodically with time. Incompressible, hydrodynamically developed laminar flow of non-Newtonian fluid flow is assumed. The transient conjugate heat transfer problem for fully-developed laminar flow of non-Newtonian fluids in circular duct is studied by numerical analysis. Control volume based finite difference method is adopted in the numerical procedure for the integration of the governing equations. For the non-Newtonian fluid part, power-law model is used. Heat generation from viscous dissipation is also taken into account and is represented by Brinkman number. The study investigates the effects of non-dimensional parameters on wall, fluid and bulk temperatures. In this dissertation, special focus is placed on the effects of the flow index, Brinkman, and Nusselt numbers.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Briggs, Alan L.albst10@pitt.eduALBST10
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairChyu, Minking K
Committee MemberChen, James L
Committee MemberSchaefer, Laura
Committee MemberMao, Scott
Date: 2 February 2004
Date Type: Completion
Defense Date: 27 August 2003
Approval Date: 2 February 2004
Submission Date: 24 November 2003
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Mechanical Engineering
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: Conjugate; Heat Transfer; non-Newtonian; Power-Law; Transient; Viscous Dissipation
Other ID:, etd-11242003-223442
Date Deposited: 10 Nov 2011 20:06
Last Modified: 15 Nov 2016 13:52


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