TY - JOUR
T1 - Direct numerical simulations of heat transfer by solid particles suspended in homogeneous isotropic turbulence
AU - Sato, Yohei
AU - Deutsch, Emmanuel
AU - Simonin, Olivier
N1 - Funding Information:
The first author is pleased to acknowledge the Japan Society for the Promotion of Science and Professor Koichi Hishida of Keio University for their help. This work was supported by the Grant-in-Aid of the Japanese Ministry of Education, Science and Culture (Grant No. 4940).
PY - 1998/4
Y1 - 1998/4
N2 - The mechanism of two-phase heat and turbulent transport by small solid particles suspended in a gas flow was investigated by direct numerical simulation in decaying isotropic turbulence with or without a mean temperature gradient. The effect of fluid mean temperature gradient on heat transfer between dispersed and gas phases was examined. Velocity and temperature fields were solved by the pseudospectral method with 1283 grid points. The behavior of 8.192 particles was time advanced by using the motion and energy equations. The imposed temperature gradient in the field affected the Lagrangian autocorrelation coefficient of the fluid temperature along the particle path which decreased more rapidly than that of the particle temperature. The particle temperature fluctuation correlated well with the particle velocity in the direction of the imposed temperature gradient, which was proportional to the magnitude of the gradient.
AB - The mechanism of two-phase heat and turbulent transport by small solid particles suspended in a gas flow was investigated by direct numerical simulation in decaying isotropic turbulence with or without a mean temperature gradient. The effect of fluid mean temperature gradient on heat transfer between dispersed and gas phases was examined. Velocity and temperature fields were solved by the pseudospectral method with 1283 grid points. The behavior of 8.192 particles was time advanced by using the motion and energy equations. The imposed temperature gradient in the field affected the Lagrangian autocorrelation coefficient of the fluid temperature along the particle path which decreased more rapidly than that of the particle temperature. The particle temperature fluctuation correlated well with the particle velocity in the direction of the imposed temperature gradient, which was proportional to the magnitude of the gradient.
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U2 - 10.1016/S0142-727X(97)10023-6
DO - 10.1016/S0142-727X(97)10023-6
M3 - Article
AN - SCOPUS:0032047268
SN - 0142-727X
VL - 19
SP - 187
EP - 192
JO - International Journal of Heat and Fluid Flow
JF - International Journal of Heat and Fluid Flow
IS - 2
ER -