Free Liquid Film : The layer of liquid that surrounds each separate particle in the underflow of a hydrocyclone and screens. The thickness of this film depends upon design of the device and viscosity of the liquid (Bul 13C)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}