Showing papers on "Glass microsphere published in 1972"
Patent•
14 Jul 1972
TL;DR: In this paper, a carbonaceous composite material of improved mechanical properties, such as compression strength and bending strength, is prepared by baking an intimate mixture of a pitch and small vitreous spheres or microballoons in the presence of an inorganic reinforcing agent.
Abstract: Lightweight, incombustible carbonaceous composite materials of improved mechanical properties, especially compression strength and bending strength, are prepared by baking an intimate mixture of a pitch and small vitreous spheres or microballoons in the presence of an inorganic reinforcing agent. The reinforcing agent may be initially admixed with the mixture or coated on the surface of the spheres prior to mixture with the pitch.
7 citations
01 Jan 1972
TL;DR: In this paper, the interaction of solid particles with turbulent fluid in the vicinity of vertical surfaces was studied, and the heat transfer to air suspensions of glass microspheres flowing upward in a 51-mm dia pipe was measured.
Abstract: From international symposium on two-phase systems; Haifa, Israel (29 Aug 1971). See CONF-710836-. The interaction of solid particles with turbulent fluid in the vicinity of vertical surfaces was studied. The heat transfer to air suspensions of glass microspheres flowing upward in a 51-mm dia pipe was measured. Glass microspheres with mean diameters of 50 mu m, 70 mu m, and 100 mu m were used in concentrations < 0.0004 volume fractions solids. The pipe Reynolds number range was 20,000 to 62,000 based on the properties of air alone. Tests in a 25-mm diameter tube using 70 mu m microsphere with a Reynolds number of 12,000 to a concentration of 0.0011 were made. A peak in the heat-transfer erihancement in the 51-mm tube was observed for a constant value of the product, d/sub p/(N/ sub Re/)/sup 7/8/, consistent wi th the previously reported fluid- solid interaction model involving the microscale of fluid turbulence. (auth)
3 citations