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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

A COMPUTING METHOD TO MEASURE PORE SIZE IN POROUS MATERIALS BASED ON CAPILLARY PENETRATION OBSERVATION

Get access (open in a dialog) DOI: 10.1615/IHTC16.tpm.023797
pages 8898-8903

Résumé

A new method that makes up for the shortages of traditional measurement is proposed in the paper to compute the average pore size in porous materials. The method is mainly built up on Lucas-Washburn equation and some relevant studies on this subject. The effect of gravity holds the key to the pore size computing in this method because the time when gravity begins to affect the flow behavior is dependent on pore size and there are two existing theoretical models to interpret flow behavior with/without gravity effects. Therefore the pore size of porous materials can be computed by fitting their flow behavior with the existing models. Before the fitting, the time when gravity begins to affect should be found out through experiments as so to choose proper model to fit different stages of flow. The method was firstly validated by a test in a single micro-tube and was proved accurate with max deviation less than 10%. Then it was applied to two porous materials with different porosities.