ANALYZING THE EFFECT OF PARTICLE ROTATION ON ITS HEAT TRANSFER RATE WHILE INTERACTING WITH A PAIR OF VORTICES

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TALEBPOUR ZAHRA; NIAZMAND HAMID

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Journal: Modares Mechanical Engineering Year:2016 | Volume:16 | Issue:8 Page(s): 0-0

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Information Journal Paper

Title

ANALYZING THE EFFECT OF PARTICLE ROTATION ON ITS HEAT TRANSFER RATE WHILE INTERACTING WITH A PAIR OF VORTICES

Author(s)

TALEBPOUR ZAHRA | NIAZMAND HAMID | Issue Writer Certificate

Keywords

VORTEX-DROPLET INTERACTIONQ1

INCOMPRESSIBLE FLOWQ2

HEAT TRANSFER COEFFICIENTQ2

DROPLETQ2

VORTEXQ1

Abstract

The interaction between vortical structures and spherical particles or DROPLETs is of practical issue intwo-phase flows. The interactions bring major changes in the flow field particularly when coupled withparticle rotation. It is observed that the heat transfer rate is significantly influenced during the time thatthe vortices’ cores are in the vicinity of the particle. In this paper, transient heat transfer of a rotatingspherical particle interacting with a pair of vortices in incompressible and viscous flow is studied usingnumerical solution of the Navier-Stokes and energy equations in the range of 20≤Re≤100 and nondimensional rotational velocities 0≤ Ω ≤1; by computational code which has been developed by theauthors. In order to ensure the accuracy of the calculation, the results are compared with numerical datareported in the literature and good agreement between results was observed. Then the effect ofcirculation direction of two vortices interacting with a particle by spin on its heat transfer rate wasinvestigated. Also, distribution of HEAT TRANSFER COEFFICIENT at the particle surface with separate rotationaround three different axes in two cases of interacting and non-interacting with vortices is given and theresults of HEAT TRANSFER COEFFICIENT are presented. The results show that particle rotation for Ω ≤0.5, inboth presence and absence of vortices in flow field has negligible effects on the particle heat transferrate; however, with increasing particle spin significant effects on HEAT TRANSFER COEFFICIENT has beenobserved that, due to the circulation direction of vortices, different amounts are obtained.

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APA: Copy

TALEBPOUR, ZAHRA, & NIAZMAND, HAMID. (2016). ANALYZING THE EFFECT OF PARTICLE ROTATION ON ITS HEAT TRANSFER RATE WHILE INTERACTING WITH A PAIR OF VORTICES. MODARES MECHANICAL ENGINEERING, 16(8), 0-0. SID. https://sid.ir/paper/355926/en

Vancouver: Copy

TALEBPOUR ZAHRA, NIAZMAND HAMID. ANALYZING THE EFFECT OF PARTICLE ROTATION ON ITS HEAT TRANSFER RATE WHILE INTERACTING WITH A PAIR OF VORTICES. MODARES MECHANICAL ENGINEERING[Internet]. 2016;16(8):0-0. Available from: https://sid.ir/paper/355926/en

IEEE: Copy

ZAHRA TALEBPOUR, and HAMID NIAZMAND, “ANALYZING THE EFFECT OF PARTICLE ROTATION ON ITS HEAT TRANSFER RATE WHILE INTERACTING WITH A PAIR OF VORTICES,” MODARES MECHANICAL ENGINEERING, vol. 16, no. 8, pp. 0–0, 2016, [Online]. Available: https://sid.ir/paper/355926/en

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