Open Access

ARTICLE

FREE CONVECTIVE HEAT TRANSFER CREATED FROM HEATED CYLINDER IMMERSED INSIDE DUCT COOLED FROM SIDE

Qais Abid Yousif^a , Omar Rafae Alomar^a,*, Obed M. Ali^b , Omar Mohammed Ali^c

a Northern Technical University, Engineering Technical College of Mosul, Cultural Group Street, Mosul, 41002, Iraq
b Northern Technical University, Technical Institute Alhuija, Kirkuk, 36001 ,Iraq
c University of Zakho, Collage of Mechanical Engineering,Kurdistan Region, 42002,Iraq
* Corresponding author. Email: omar.alomar@ntu.edu.iq

Frontiers in Heat and Mass Transfer 2023, 20, 1-14. https://doi.org/10.5098/hmt.20.20

Abstract

This work involves a numerical investigation on free convection heat transfer occurred by a hot cylinder immersed in a square duct cooled from one side under different temperatures. Simulations have been done for a large ranges of Rayleigh number (10³ ≤ Ra ≤10⁷ ) and right wall temperature (0≤T_r ≤0.75). The results displayed that Nu is enhanced with rising in Ra and decreasing in T_r. The value of Nu is decreased with rising in T_r, where the maximum reduction in Nu is about 32% for T_r=0.75 as compared to T_r=0. The maximum enhancement range for Nu is found between 50% and 100% for low Ra and between 20% and 30 % for high Ra. The variations of local Nu display that Ra has an extremely actions on the characteristics of flow and temperature fields.

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Keywords

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