Similitude requirements for modelling NAPL movement with a geotechnical centrifuge

The scaled modelling of non-aqueous phase liquid (NAPL) transport in porous media is examined with particular reference to the use of a geotechnical centrifuge as a tool for modelling this phenomenon. Scaling relationships for NAPL mobility are derived. These relationships suggest that when line controlling length for a problem is macroscopic, similitude between a centrifuge model and the prototype can be achieved; otherwise, direct scaling of data from a centrifuge model to the prototype is not possible. Three examples of centrifuge studies that investigated different categories of subsurface NAPL movement are presented, By analysing these studies, it is shown that bulk NAPL migration and gravity-driven wetting front instability can be correctly scaled using a geotechnical centrifuge; however, NAPL entrapment by capillary forces can not be thus scaled.

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Proceedings of the Institution of Civil Engineers, Geotechnical Engineering, 131, 3, 180-186

Note: The status of this file is: Involved Laboratories Only

 Record created 2005-12-09, last modified 2018-03-17

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