Developing laminar natural convection of power law fluids in vertical open ended channel

•Temperatures and velocities are presented.•Average Nusselt number variations are given.•Newtonian and the power law fluids are compared. Steady, developing laminar natural convection heat transfer for power law fluids between two parallel vertical plates where the fluid is entrained from the bottom...

Full description

Saved in:
Bibliographic Details
Published in:International journal of heat and mass transfer 2019-01, Vol.128, p.354-362
Main Authors: Zhou, Enguang, Bayazitoglu, Yildiz
Format: Article
Language:English
Subjects:
Aspect ratio
CAD
Computational fluid dynamics
Computer aided design
Fluid flow
Free convection
Heat exchangers
Heat transfer
Laminar heat transfer
Natural convection
Newtonian fluids
Non Newtonian fluids
Nusselt number
Open ended vertical channel
Power law
Power law fluids
Prandtl number
Velocity distribution
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•Temperatures and velocities are presented.•Average Nusselt number variations are given.•Newtonian and the power law fluids are compared. Steady, developing laminar natural convection heat transfer for power law fluids between two parallel vertical plates where the fluid is entrained from the bottom and exiting from top is studied. The results for asymmetric and symmetric configurations of the heated plates, which are kept at uniform temperatures with an aspect ratio of 40, are presented. For the numerical computations, the ANSYS Workbench Fluent commercial package is used to solve the governing equations and its numerical output is post-processed. Various range values of Rayleigh number (Ra = 104, 105, 106) Prandtl number (Pr = 10, 100, 1000), non-Newtonian power law indexes (0.6⩽n⩽1.4) of the fluids and the temperature ratios of colder and hotter walls (rT = 0, 0.5, 1.0) are considered. The temperature and velocity profiles, and the average Nusselt number distributions are presented. Comparisons between Newtonian and non-Newtonian fluids are made in terms of the variations of the average Nusselt number as a function of the non-dimensional governing parameters.
ISSN:0017-9310
1879-2189
DOI:10.1016/j.ijheatmasstransfer.2018.08.050