M.S. (Master of Science)
Department of Mechanical Engineering
Fluid dynamics; Heat--Conduction; Shear flow
The purpose of this research is to employ an innovative method to measure the non-Newtonian fluid thermal conductivity while in shearing flow, and to determine its dependence on the shearing itself. A coaxial cylinder apparatus with a rotating outer cylinder was used for the determination of the thermal conductivity. The measurement and control are accomplished and integrated by using a computerized data acquisition system and a comprehensive virtual instrument, developed using the LabVIEW application software. It was found that the thermal conductivity of a Newtonian fluid, such as distilled water, was virtually independent of the fluid motion. However, for non-Newtonian fluids such as aqueous polyacrylamide solutions (1000 and 2000 wppm Praestol solutions), there was a 10-20% increase of thermal conductivity in the operating shear rate range (40
Tong, Haibo, "A novel thermal conductivity measurement of fluids with changing and anistropic structure due to shearing flow" (1997). Graduate Research Theses & Dissertations. 448.
xi, 85 pages
Northern Illinois University
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