Open AccessInfluence study of porous material and diameter on heat transmission from corrugated walls cavity
Author(s) -
Mays Subhi Sadeq,
Zena Khalefa Kadhi
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1076/1/012078
Subject(s) - materials science , heat transfer , thermal conductivity , natural convection , adiabatic process , porous medium , porosity , composite material , convection , cavity wall , heat flux , thermal , heat transfer coefficient , thermodynamics , mechanics , optics , physics
Experimental study of heat transfer by free convection in a cavity filled with a porous medium. The study carried out on three forms of cavities (a cavity with flat walls, opposite walls, and similar walls), for the wavy wall cavity the (Asp=1), where a regular thermal flux was applied at the bottom with five values ranging between (500-2000) W/m2 by using five voltages (8,10,12,14 and 16) W. The side was completely insulated to be adiabatic and the upper surface of the cavity is exposed to free convection. The sand (1 mm and 3 mm) and glass (1 mm and 5 mm) were used as a porous medium of the three forms of cavities that have been studied. The experimental results show that the cavity with opposite walls gives the largest difference in temperature, as this difference is the basis for studying the other parameter. The lower thermal conductivity of the materials gives the greater heat transfer process, and this was demonstrated by the materials used, where sand gave the best heat transfer. When the diameter of the porous material increases, the temperature difference will decrease, and accordingly the heat transfer coefficient of free convection increases.