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Effective thermal conductivity of a wet porous medium – presence of hysteresis when modeling the spatial water distribution for the pendular regime
Abstract : This paper deals with the heat transfer between two spherical grains separated by a small gap; dry air is located outside the grains and a liquid water meniscus is supposed to be present between them. This problem can be seen as a micro-scale cell of an assembly of solid grains, for which we are looking for the effective thermal conductivity. For a fixed contact angle and according to the volume of the liquid meniscus, two different shapes are possible for the meniscus, giving a "contacting" state (when the liquid makes a true bridge between the two spheres) and a "non-contacting" one (when the liquid is split in two different drops, separated by a thin air layer); the transition between these two states occurs at different times when increasing or decreasing the liquid volume, thus leading to a hysteresis behavior when computing the thermal flux across the domain.
Cited literature [8 references]
https://hal.inria.fr/hal-01095522
Contributor : Édouard Canot <>
Submitted on : Monday, December 15, 2014 - 5:03:46 PM
Last modification on : Tuesday, June 15, 2021 - 4:07:56 PM
Long-term archiving on: : Monday, March 16, 2015 - 12:31:28 PM
Contributor : Édouard Canot <>
Submitted on : Monday, December 15, 2014 - 5:03:46 PM
Last modification on : Tuesday, June 15, 2021 - 4:07:56 PM
Long-term archiving on: : Monday, March 16, 2015 - 12:31:28 PM
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