Optimal Experiment Design and Measurement of the Effective Thermal Conductivity of a Porous Medium in the Presence of Free Convection

2009 ◽  
Vol 12 (6) ◽  
pp. 573-583
Author(s):  
Sami Znaidia ◽  
Fethi Albouchi ◽  
Foued Mzali ◽  
Abdelmajid Jemni ◽  
Sassi Ben Nasrallah
2020 ◽  
Vol 53 (2) ◽  
pp. 13311-13316
Author(s):  
Xu Du ◽  
Alexander Engelmann ◽  
Yuning Jiang ◽  
Timm Faulwasser ◽  
Boris Houska

2014 ◽  
Vol 8 (1) ◽  
pp. 20 ◽  
Author(s):  
Joep Vanlier ◽  
Christian A Tiemann ◽  
Peter AJ Hilbers ◽  
Natal AW van Riel

Author(s):  
Sergey Abrashov ◽  
Mathieu Moze ◽  
Xavier Moreau ◽  
Rachid Malti ◽  
Franck Guillemard

2019 ◽  
Vol 38 (3) ◽  
pp. 844-861 ◽  
Author(s):  
Bo Zhao ◽  
Justin P. Haldar ◽  
Congyu Liao ◽  
Dan Ma ◽  
Yun Jiang ◽  
...  

2009 ◽  
Vol 38 (11) ◽  
pp. 2218-2223 ◽  
Author(s):  
Alex Sandro Campos Maia ◽  
Roberto Gomes da Silva ◽  
João Batista Freire de Souza Junior ◽  
Rosiane Batista da Silva ◽  
Hérica Girlane Tertulino Domingos

The objective of the present study was to assess the effective thermal conductivity of the hair coat (k ef, mW.m-1.K-1) of Holstein cows in a tropical environment, as related to conduction and radiation in the absence of free convection. The average k ef was 49.72 mW.m-1.K-1, about twice the conductivity of the air (26 mW.m-1.K-1) and much less than that of the hair fibres (260 mW.m-1.K-1). The low k ef values were attributed mainly to the small cross area of individual hairs, ρef/ρf (17.2% and 21.3% for black and white hairs, respectively). White coats were denser, with longer hairs and significantly higher k ef (53.15 mW.m-1.K-1) than that of the black hairs (49.25 mW.m-1.K-1). The heritability coefficient of the effective thermal conductivity was calculated as h²=0.18 the possibility was discussed of selecting cattle for increased heat transfer through the hair coat.


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