Tensile stress in a porous medium due to gas expansion

Benes, Nieck E. and Biesheuvel, P. Maarten and Verweij, Henk (1999) Tensile stress in a porous medium due to gas expansion. AIChE Journal, 45 (6). pp. 1322-1328. ISSN 0001-1541

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Abstract:	Stress profiles develop in a porous material due to a gas-phase pressure difference and subsequent gas flow. If stresses become tensile, material failure (explosion and blistering) can occur. Stress profiles are calculated for an asymmetric inorganic porous disk-like membrane material placed in a pressure vessel, which is depressurized. The stress that develops in the membrane material depends on the gas-phase pressure and the porosity. The gas-phase pressure is a function of place, time and characteristics of the membrane, the vessel and the valve. Two regimes are identified for membrane depressurization, and a critical initial pressure is defined below which tensile stresses cannot develop. The theory presented combines the dusty gas model with balances for mass, momentum, and mechanical energy.
Item Type:	Article
Copyright:	© 1999 Wiley InterScience
Faculty:	Science and Technology (TNW)
Research Group:	Inorganic Membranes (IM)
Link to this item:	http://purl.utwente.nl/publications/71506
Official URL:	http://dx.doi.org/10.1002/aic.690450616
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Metis ID: 105415