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CATEGORIES:Lecture or Presentation
DESCRIPTION:"Using Chemical Potential and Gibbs Potential to Model Vapor Tr
ansport Through Partially Saturated Porous Media and As Boundary Conditions
for Nanopores or Swelling Porous Media"\n\nby Lynn Schreyer from Washingto
n State University in STAG 113\n\nLink to AMC seminar. \n\n \n\nAbstract\n
\nThe concept of a potential (e.g. chemical potential\, Gibbs potential) in
regards to modeling transport in porous media is not intuitive. Yet unders
tanding it helps provide physical intuition and using it as a primary unkno
wn can\, in some cases\, simplify the model. We will consider two examples:
\n\n(1) It is well known that water vapor transport in porous media is enha
nced when the porous media is partially saturated with liquid water. Modeli
ng vapor transport at the pore scale is traditionally done by considering p
ressures as the primary dependent variables\, which then involves capturing
contact angles and curvature. Here we show that by changing the dependent
variable to relative humidity (or more generally chemical potential)\, a mu
ch simpler model can be developed and is conceptually easier to understand.
Comparing analytical results with experimental data show that indeed\, it
is a reasonable model.\n\n(2) When bulk fluid is in contact with a swelling
porous media\, membranes\, or nanopores\, it is often mistakenly assumed t
hat pressure and/or concentration are continuous across the boundary. Here
we show that it is the Gibbs potential or chemical potential that is contin
uous.\n\nThis talk is primarily based on the following papers\n\nPore-scale
modeling of vapor transport in partially saturated capillary tube with var
iable area using chemical potential\, Addassi\, Schreyer\, Johannesson\, an
d Lin\, Water Resources Research\, 2016.\n\nMacroscopic Flow Potentials in
Swelling Porous Media\, Schreyer-Bennethum\, Transport in Porous Media\, 20
12.\n\nBio:\n\nAfter obtaining a BS and MS in Mechanical Engineering\, Lynn
found her true home in Applied Mathematics\, and obtained her PhD in 1994
from Purdue University (where she also became good friends with Malgo and R
alph). She then did a post doc in Agronomy at Purdue University before beco
ming a professor at University of Colorado Denver. In 2016 she moved to the
Department of Mathematics and Statistics at Washington State University\,
where she now resides.\n\nLynnâ€™s specialty is in modeling Multiphysics prob
lems involving flow\, transport\, and deformation of porous materials. Her
work has been used to model paper\, drug-delivery polymers\, movement of ci
lia in lungs\, swelling clay soils\, and wood. She is currently working on
modeling the movement of ungulates (with Zach Hilliard)\, wave propagation
through porous media\, and carbon cycling.\n\nLynn has been the president o
f SIAM Geosciences\, the program chair for InterPore 2012\, Vice President
for the SIAM Pacific Northwest Section (2020-2022)\, and co-chaired the SIA
M Pacific Northwest Section biennial meeting that took place in 2022.
DTEND:20230512T195000Z
DTSTAMP:20230603T073539Z
DTSTART:20230512T190000Z
GEO:44.565645;-123.27729
LOCATION:Strand Agriculture Hall\, 113
SEQUENCE:0
SUMMARY:Applied Mathematics and Computation Seminar
UID:tag:localist.com\,2008:EventInstance_42482765676804
URL:https://events.oregonstate.edu/event/applied_mathematics_and_computatio
n_seminar_8592
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