Investigation of heat transfer in the cup-cast method by experiment, and analytical method

A steady-state analytical method has been developed to estimate the amount of heat extracted from a blood vessel running close to the skin surface which is cooled in a symmetrical fashion by a cooling strip. The results indicate that the optimum width of a cooling strip is approximately three times the depth to the centerline of the blood vessel. The heat extracted from a blood vessel similar to the carotid artery by such a strip is about 0.9 w/m-deg C, which is too small to affect significantly the temperature of the blood flow through a main blood vessel, such as the carotid artery.

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Heat transfer study of mechanical face seal and fin by analytical method

Engineering Science and Technology an International Journal ◽

10.1016/j.jestch.2018.05.001 ◽

2018 ◽

Vol 21 (3) ◽

pp. 380-388 ◽

Cited By ~ 4

Author(s):

M. Mosavat ◽

R. Moradi ◽

M. Rahimi Takami ◽

M. Barzegar Gerdroodbary ◽

D.D. Ganji

Keyword(s):

Heat Transfer ◽

Analytical Method ◽

Face Seal ◽

Mechanical Face Seal ◽

Transfer Study

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A non-field analytical method for heat transfer problems through a moving boundary

Scientific Reports ◽

10.1038/s41598-021-98572-x ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Vladimir Kulish ◽

Vladimír Horák

Keyword(s):

Heat Transfer ◽

Chemical Reactions ◽

Analytical Method ◽

Moving Boundary ◽

Front Propagation ◽

Final Part ◽

Important Type ◽

Propagation Law ◽

Transfer Problems

AbstractThis paper presents an extension of the non-field analytical method—known as the method of Kulish—to solving heat transfer problems in domains with a moving boundary. This is an important type of problems with various applications in different areas of science. Among these are heat transfer due to chemical reactions, ignition and explosions, combustion, and many others. The general form of the non-field solution has been obtained for the case of an arbitrarily moving boundary. After that some particular cases of the solution are considered. Among them are such cases as the boundary speed changing linearly, parabolically, exponentially, and polynomially. Whenever possible, the solutions thus obtained have been compared with known solutions. The final part of the paper is devoted to determination of the front propagation law in Stefan-type problems at large times. Asymptotic solutions have been found for several important cases of the front propagation.

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Study on Analytical Method for Thermal and Flow Field of a Turbocharger With the Catalyst Unit

Volume 8: Microturbines, Turbochargers, and Small Turbomachines; Steam Turbines ◽

10.1115/gt2019-90451 ◽

2019 ◽

Author(s):

Tsuyoshi Kitamura ◽

Seiichi Ibaraki ◽

Yuichi Kihara ◽

Toru Hoshi ◽

Motoki Ebisu

Keyword(s):

Heat Transfer ◽

Experimental Data ◽

Experimental Study ◽

Flow Field ◽

Thermal Management ◽

Analytical Method ◽

Conjugate Heat Transfer ◽

Downstream Side ◽

Mutual Dependence ◽

Start Up

Abstract The analytical and experimental study on thermal and flow field of a turbocharger with the catalyst unit has been conducted for the thermal management at the downstream side of turbochargers, which have crucial effects on activation of catalyst units. CHT (Conjugate Heat Transfer) calculations, working for simulating heat transfer with mutual dependence between solid structures and fluid, are applied to the turbocharger including the turbine section, the bearing housing and the catalyst unit to acquire the whole of thermal and flow field accurately. The modeling for catalyst element has also been developed. In addition, the gas stand test demonstrated turbochargers under cold start-up condition to validate CHT calculations. Analytical results are evaluated against experimental data. Eventually, the proposed analytical method has been proved to have the advantage of designing for heating catalyst units.

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