Premium
A simplified approach to solving conjugate heat transfer problems in annular and dissimilar parallel plate ducts
Author(s) -
AlNimr M. A.
Publication year - 1998
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/(sici)1099-114x(19981010)22:12<1055::aid-er423>3.0.co;2-u
Subject(s) - dimensionless quantity , mechanics , heat transfer , perturbation (astronomy) , thermodynamics , thermal , heat transfer coefficient , convection , convective heat transfer , fluid dynamics , materials science , physics , quantum mechanics
A simple perturbation technique is used to reformulate the energy equations which describe the treatment thermal behaviour of a radially lumped conjugate that transfer problem is annular and dissimilar parallel plate ducts of finite wall thickness. The simplified perturbation tecnique is used to eliminate the coupling between the fluid and the solid‐wall energy equations when the temperature difference between the fluid and the solid‐wall is a small perturbed quantity, which is true when the interface convective heat transfer coefficient between the fluid and the solid‐wall is high. A mathematical criterion is derived to determine the conditions under which the fluid and the solid‐wall are in thermal equilibrium. It is found that seven dimensionless parameters control the state of the thermal equilibrium between the fluid and the solid domains. © 1998 John Wiley & Sons, Ltd.