Inverse determination of boundary conditions during boiling water heat transfer in quenching operation

2004 ◽  
Vol 155-156 ◽  
pp. 1324-1329 ◽  
Author(s):  
A. Buczek ◽  
T. Telejko
Keyword(s):  
Heat Transfer ◽  
Boundary Conditions ◽  
Boiling Water

Determination of Optimum Profile of One-Dimensional Cooling Fins

1983 ◽  
Vol 105 (3) ◽  
pp. 317-320 ◽  
Author(s):  
S. K. Hati ◽  
S. S. Rao
Keyword(s):  
Heat Transfer ◽  
Differential Equations ◽  
Boundary Conditions ◽  
Minimum Principle ◽  
Problem Formulation ◽  
One Dimensional ◽  
A New Technique ◽  
The One ◽  
Optimum Profile

The optimum design of an one-dimensional cooling fin is considered by including all modes of heat transfer in the problem formulation. The minimum principle of Pontryagin is applied to determine the optimum profile. A new technique is used to solve the reduced differential equations with split boundary conditions. The optimum profile found is compared with the one obtained by considering only conduction and convection.

Heat Transfer Boundary Conditions of Piston of Aviation Reciprocating Engine

2014 ◽  
Vol 602-605 ◽  
pp. 357-360
Author(s):  
Shu Xian Chen ◽  
Xin Meng ◽  
Xiang Chuan Guo ◽  
Yong Zhang
Keyword(s):  
Heat Transfer ◽  
Temperature Field ◽  
Temperature Distribution ◽  
Theoretical Analysis ◽  
Boundary Conditions ◽  
Piston Ring ◽  
Thermal Loads ◽  
Reciprocating Engine ◽  
Engine Piston

To assess piston’s thermal loads, the direct and effective method is to calculate piston’s temperature distribution. A key point in calculating the temperature field of a piston is the determination of heat transfer boundary conditions of each side, especially the gas side. The thermal boundaries of a piston consist of the piston top side (combustion side), the crevice surfaces, the piston ring land and skirt outside surface, piston underside and pin hole side.The calculating methods for the heat transfer boundary conditions of engine piston are studied according to the theoretical analysis of heat transfer of engine piston, which can be taken as a reference for providing precise boundary conditions for the research on piston’s temperature field.

scholarly journals THE PROCESS OF HEAT TRANSFER IN TWO-LAYERED CYLINDRICAL BODY

2019 ◽  
Vol 20 (11-12) ◽  
pp. 93-98
Author(s):  
U. V. Vidin ◽  
R. V. Kazakov ◽  
V. S. Zlobin
Keyword(s):  
Heat Transfer ◽  
Heat Conduction ◽  
Boundary Conditions ◽  
Analytical Method ◽  
Analytical Methods ◽  
Cylindrical Body ◽  
Characteristic Equations ◽  
The Third ◽  
Thermal Regimes

Determination of thermal regimes of composite cylindrical bodies by analytical methods leads to the appearance of complex characteristic equations, the solution of which is the determination of eigenvalues. The article considers a relatively simple approximate analytical method for determining the eigenvalues of characteristic equations for a two-layer cylindrical body under boundary conditions of the third kind. This method can also be easily used in more complex formulations of heat conduction problems.

Experimental Study on Heat Transfer Boundary Conditions for Steel Hot Extrusion Process

2013 ◽  
Vol 668 ◽  
pp. 856-860 ◽  
Author(s):  
Chang Yong Liu ◽  
Lei Zhang ◽  
Fei Yu Kang
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Boundary Conditions ◽  
Thermal Contact ◽  
Hot Extrusion ◽  
Extrusion Process ◽  
Experimental Basis ◽  
P92 Steel ◽  
Glass Lubricant

Heat transfer boundary conditions have significant influence on the FEM analysis of the steel hot extrusion process using glass lubricant. However, the determination of heat transfer coefficient between billet and tooling lacked experimental basis. In order to obtain rational values of the coefficient, experimental study was conducted to measure it on thermal contact between P92 steel and H13 steel separated by glass lubricant. The influence of contact temperature, contact pressure and lubricant thickness was investigated. The obtained results can provide experimental basis for the determination of heat transfer boundary conditions for steel hot extrusion.

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