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https://doi.org/10.1016/S0009-2509(00)00358-4

has been cited by the following article:

• TITLE: Effects of Nonuniform Outflow and Buoyancy on Drag Coefficient Acting on a Spherical Particle

  AUTHORS: Mariko Watanabe, Joji Yahagi

  KEYWORDS: Drag Force, Particle, Nonuniform Outflow, Heat

  JOURNAL NAME: Journal of Flow Control, Measurement & Visualization, Vol.5 No.4, October 19, 2017

  ABSTRACT: Pyrolysis gas jets out from the surface of a solid fuel particle when heated. This study experimentally observes the occurrence of gas jetsfrom heated solid fuel particles. Results reveal a local gas jet occurs from the particle’s surface when its temperature reaches the point at which a pyrolysis reaction occurs. To investigate the influence of the gas jet on particle motion, a numerical simulation of the uniform flow around a spherical particle with a nonuniform outflow or high surface temperature is conducted, and the drag force acting on the spherical particle is estimated. In the numerical study, the magnitude of the outflow velocity, direction of outflow, and Rayleigh number,i.e., particle surface temperature, are altered, and outflow velocities and the Rayleigh number are set based on the experiment. The drag coefficient is found to decrease when an outflow occurs in the direction against the mainstream; this drag coefficient at a higher Rayleigh number is slightly higher than that at a Rayleigh number of zero.