"Numerical Predictions of Laminar Forced Convection Heat Transfer with " by K. S. Rajendra Prasad, Sathya Sai et al.
 

Numerical Predictions of Laminar Forced Convection Heat Transfer with and without Buoyancy Effects from an Isothermal Horizontal Flat Plate to Supercritical Nitrogen

Document Type

Article

Publication Title

Frontiers in Heat and Mass Transfer

Abstract

Numerical predictions are made for Laminar Forced convection heat transfer with and without buoyancy effects for Supercritical Nitrogen flowing over an isothermal horizontal flat plate with a heated surface facing downwards. Computations are performed by varying the value of ΔT from 5 to 30 K and P∞/Pcr ratio from 1.1 to 1.5. Variation of all the thermophysical properties of supercritical Nitrogen is considered. The wall temperatures are chosen in such a way that two values of Tw are less than T* (T* is the temperature at which the fluid has a maximum value of Cp for the given pressure), one value equal to T* and two values greater than T*. Three different values of U∞ are used to obtain Re∞ range of 3.6 × 104 to 4.74 × 105 for forced convection without buoyancy effects and Gr∞/Re2∞ range of 0.011 to 3.107 for the case where buoyancy effects are predominant. Six different forms of correlations are proposed based on numerical predictions and are compared with actual numerical predictions. It has been found that in all six forms of correlations, the maximum deviations are found to occur in those cases where the pseudocritical temperature TT*lies between the wall temperature and bulk fluid temperature.

First Page

889

Last Page

917

DOI

10.32604/fhmt.2024.047703

Publication Date

1-1-2024

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