Ceramics-Silikáty 42, (2) 49 - 54 (1998) |
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MONTE CARLO SIMULATION OF KNUDSEN'S DIFFUSION IN CERAMICS
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Banerjee Goutom 1, Das Ranjit 1, Roy Abani Bhusan 2
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1 Central Glass & Ceramic Research Institute, Computer centre,
Jadavpur University, 196 Raja S.C. Mullick Road,
Calcutta-700032, India
2 Department of Mathematics,
Jadavpur University,
Calcutta-700032, India
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The Monte Carlo simulation technique has been described to estimate the Knudsen's coefficient of vapour diffusion through ceramic materials which have nano size pores. The simulation results agree well with the results obtained from theory. A decrease in the length-radius ratios of the capillary pore confirms that shorter length and bigger pore size of capillaries will enable faster molecular transport through the specimen. Subtraction of the estimate of molecular escape probability from total probability helps us obtain a measure of the impedance of vapour molecules within the specimen. Some possible applications of the technique in ceramics along with remarks for extension to complicated diffusion regimes are discussed.
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