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Numerical Investigation of the Influence of the Particle/Pipe Diameter Ratio in a Non-Isothermal Gas-Solid Flow

[+] Author Affiliations
V. Chagras, S. Moissette, P. Boulet, B. Oesterle

Université Henri Poincaré, Vandoeuvre lès Nancy, France

Paper No. FEDSM2002-31215, pp. 333-340; 8 pages
  • ASME 2002 Joint U.S.-European Fluids Engineering Division Conference
  • Volume 2: Symposia and General Papers, Parts A and B
  • Montreal, Quebec, Canada, July 14–18, 2002
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-3616-9 | eISBN: 0-7918-3600-2
  • Copyright © 2002 by ASME


Heat transfer in a gas-solid suspension flowing upwards in a heated pipe has been addressed numerically using an Eulerian-Lagrangian approach. Following the basic idea of available experimental studies, several configurations have been simulated and compared, varying the relative size of the particles, i.e. the ratio dp /D. Numerical results show that this ratio has a significant influence upon the fluid and particle velocities and temperatures. However, the resulting suspension Nusselt number is found to be only weakly modified by the parameter dp /D at moderate loading ratio m. This is in accordance with available measurements (e.g. Farbar and Depew, 1963) which do not show a clear dependence of the Nusselt number upon dp /D in the range 0 < m < 3. Associating the influence of this relative size parameter with effects related to inter-phase exchange area, other dimensionless parameters like the flow and particle Reynolds numbers, some Froude number, as well as the heat capacity ratio, density- and loading ratios, would of course be required in order to achieve full similarity of the suspension flow.

Copyright © 2002 by ASME



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