Modelling hysterisis phenomena in systems of multiple slits: Application of the principle of a minimum rate of entropy production at steady state
✍ Scribed by Richard A. Holub; P.A. Ramachandran; M.P. Duduković
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 436 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0895-7177
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✦ Synopsis
In recent publications (Km and Greenfield, 1975, Levee, 1986, and Christensen, 1986), an experimentally observed phenomena of pressure drop hysterisis in two phase, cocurrent downflow of gas and liquid in packed beds has been reported.
Until now, the phenomena is only qualitatively explained as an receding contact angle phenomena and no fundamental model has been developed which could predict the hysterisis.
In this paper, a model is proposed which predicts the gas-liquid distribution in systems of multiple slits.
The basis for the model is the principle of a minimum rate of entropy production at steady state and the model does predict a hysterisis in pressure drop and liquid saturation. Extension of the model to packed beds is not a trivial matter and work is currently underway on this problem.