scholarly journals Local heat transfer estimation in microchannels during convective boiling under microgravity conditions: 3D inverse heat conduction problem using BEM techniques

2008 ◽  
Vol 135 ◽  
pp. 012067 ◽  
Author(s):  
S Luciani ◽  
C Le Niliot
Keyword(s):  
Heat Transfer ◽  
Heat Conduction ◽  
Heat Conduction Problem ◽  
Local Heat Transfer ◽  
Local Heat ◽  
Inverse Heat Conduction Problem ◽  
Inverse Heat Conduction ◽  
Convective Boiling ◽  
Microgravity Conditions

Nonlinear Inverse Heat Conduction With a Moving Boundary: Heat Flux and Surface Recession Estimation

1999 ◽  
Vol 121 (3) ◽  
pp. 708-711 ◽  
Author(s):  
V. Petrushevsky ◽  
S. Cohen
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Fourier Series ◽  
Heat Conduction ◽  
Moving Boundary ◽  
Heat Conduction Problem ◽  
Inverse Heat Conduction Problem ◽  
Variable Order ◽  
Inverse Heat Conduction ◽  
One Dimensional

A one-dimensional, nonlinear inverse heat conduction problem with surface ablation is considered. In-depth temperature measurements are used to restore the heat flux and the surface recession history. The presented method elaborates a whole domain, parameter estimation approach with the heat flux approximated by Fourier series. Two versions of the method are proposed: with a constant order and with a variable order of the Fourier series. The surface recession is found by a direct heat transfer solution under the estimated heat flux.

scholarly journals Experimental analysis of the evaporation of a thin liquid film deposited on a capillary heated tube: estimation of the local heat transfer coefficient

2021 ◽  
Vol 2116 (1) ◽  
pp. 012110
Author(s):  
L Cattani ◽  
F Bozzoli ◽  
V Ayel ◽  
C Romestant ◽  
Y Bertin
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Liquid Film ◽  
Transfer Coefficient ◽  
Heat Conduction Problem ◽  
Thin Liquid Film ◽  
Local Heat Transfer ◽  
Local Heat ◽  
Inverse Heat Conduction Problem ◽  
Two Phase

Abstract The aim of this work is to estimate the local heat flux and heat transfer coefficient for the case of evaporation of thin liquid film deposited on capillary heated channel: it plays a fundamental role in the two-phase heat transfer processes inside mini-channels. In the present analysis it is investigated a semi-infinite slug flow (one liquid slug followed by one single vapour bubble) in a heated capillary copper tube. The estimation procedure here adopted is based on the solution of the inverse heat conduction problem within the wall domain adopting, as input data, the temperature field on the external tube wall acquired by means of infrared thermography.

scholarly journals Experimental investigation of convective boiling in mini-channels: Cooling application of the proton exchange membrane fuel cells

2017 ◽  
Vol 21 (1 Part A) ◽  
pp. 223-232 ◽  
Author(s):  
Mounir Boudouh ◽  
Ameur Si ◽  
Hasna Louahlia-Gualous
Keyword(s):  
Heat Transfer ◽  
Surface Temperature ◽  
Boiling Heat Transfer ◽  
Heat Conduction Problem ◽  
Local Heat Transfer ◽  
Local Heat ◽  
Proton Exchange ◽  
Low Flow ◽  
Convective Boiling ◽  
Maximum Heat

An experimental study of convective boiling heat transfer of water flowing in minichannels at low flow rate is carried out with pure de-ionised water and copper-water nanofluids. A low concentration of copper nanometer-sized particles was used to enhance the boiling heat transfer. The aim is to characterize the surface temperature as well as to estimate the local heat transfer coefficients by using the inverse heat conduction problem IHCP. The inlet water temperature is fixed at 60?C and mass fluxes operated in range of 212-573 kg/m?.s in minichannels of dimensions 500?2000 ?m?. The maximum heat flux investigated in the tests is limited to 7000 W/m?. The results show that the surface temperature and the local heat transfer coefficient are dependent on the axial location and the adding of copper nanoparticles can significantly improve the heat transfer.

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