Volume 3, Issue 3 (2001)
JAST 2001, 3(3): 227-235 |
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Keyhani A, Wulfsohn D. Sensitivity of Soil Coupled Heat and Mass Transfer Governing
Equations to Hydraulic and Thermal Conductivities. JAST 2001; 3 (3) :227-235
URL: http://jast.modares.ac.ir/article-23-2335-en.html
URL: http://jast.modares.ac.ir/article-23-2335-en.html
1- Department of Power and Machinery, Faculty of Agriculture, University of Tehran, Karaj, Islamic Republic
of Iran.
2- Institute for Maskinteknik, Aalborg Universitet, Potoppianstraede 101, 922 Aalborg Oest, Denmark.
2- Institute for Maskinteknik, Aalborg Universitet, Potoppianstraede 101, 922 Aalborg Oest, Denmark.
Abstract: (5550 Views)
A pressure-based coupled heat and mass transfer model was used to simulate temperature
and soil suction in a drying process within a clay soil column. Closed form functions
were used for all parameters needed in the governing equations. Model predictions were
compared with experimental data using the mean relative percentage deviation method.
Thermocouples and mini-gypsum blocks were used to monitor the data collected hourly
at different depths of the soil column. The model showed very high sensitivity to the proposed
hydraulic conductivity function, while lower sensitivity was found for the proposed
thermal conductivity function. This result highlights the importance of a proper hydraulic
conductivity estimate while a rough estimate for thermal conductivity would have no significant
adverse effect on the predicted values.
Subject:
Soil Science
Received: 2010/05/16 | Accepted: 2010/05/16 | Published: 2010/05/16
Received: 2010/05/16 | Accepted: 2010/05/16 | Published: 2010/05/16
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