TY - JOUR
ID -
TI - Variation of Heat Transfer Coefficient for Inside and Outside Closed Space with Respect to Temperature Gradient for Three Different Metals
AU - M.M. Hamadi
AU - Z.H. Mohsein
PY - 2017
VL - 35
IS - 5 Part (A) Engineering
SP - 537
EP - 545
JO - Engineering and Technology Journal مجلة الهندسة والتكنولوجيا
SN - 16816900 24120758
AB -
The heat transfer coefficient (h), is used in thermodynamics to calculate the heat transfer typically occurring by convection. A simple way to calculate (h) is to define it through the classical formula for convection, the present study includes correlations different natural convection can be used to calculate heat transfer coefficients theoretically for the experimental tests done inside and outside close system. All the results obtained from the experimental tests, theoretical calculations and from the literatures show that, heat transfer coefficients (h) are increasedwiththe temperature increasing. The experimental results for all the tested materials appears that there are similarity for the rules of sequence step in the change of heat transfer coefficient (h) with respect to the thermal conductivity coefficients (k) of these materials, and they are in a row from the highest value to the lowest value; Copper, Aluminum, Steel and Brick respectively for both of (k) and (h). The results show a good accuracy and compatibility of the comparison between numerical results with the present experimental work, also give a good agreement between the present experimental work and the numerical results with the experimental results obtained from literature approved in this study.
ER -