An experimental investigation of pressure drop of aqueous foam in laminar tube flow
Abstract
This report is the first of two detailing pressuredrop and heattransfer measurements made at the Foam Flow Heat Transfer Loop. The work was motivated by a desire to extend the application of aqueous foam from petroleum drilling to geothermal drilling. Pressuredrop measurements are detailed in this report; a forthcoming report (SAND851922) will describe the heattransfer measurements. The pressure change across a 2.4m (8ft) length of the 2.588cm (1.019in.) ID test section was measured for liquid volume fractions between 0.05 and 0.35 and average velocities between 0.12 and 0.80 m/s (0.4 and 2.6 ft/s). The resulting pressuredrop/flowrate data were correlated to a theoretical model for a Bingham plastic. Simple expressions for the dynamic viscosity and the yield stress as a function of liquid volume fraction were estimated.
 Publication:

NASA STI/Recon Technical Report N
 Pub Date:
 April 1987
 Bibcode:
 1987STIN...8726315B
 Keywords:

 Drilling;
 Foams;
 Laminar Flow;
 Pressure Reduction;
 Flow Velocity;
 Fluid Flow;
 Geothermal Technology;
 Heat Transfer;
 Oil Exploration;
 Fluid Mechanics and Heat Transfer