Numerical investigation of triangular bluff bodies size effect on heat and mass transfer phenomena: internal flow

Fallah, Davoud Abbasinezhad; Rezazadeh, Sajad; Jalili, Habib; Raad, Mohammad

doi:10.1007/s40430-022-03526-7

Cited by 4 publications

(1 citation statement)

References 38 publications

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“…As per the above literature findings, there are several research available on double-diffusive heat and mass transfer conducted through experimental, analytical and numerical approaches. It is also observed that few authors worked on the rotation of the entire system along domain axis, and most of the researchers usually focused on the stationery domain [41] for heat and mass transfer in natural convection or mixed convection flow and forced convection flow over the bluff body for heat [42] and mass transfer [43]. It is pertinent to note that attention is not given to the study on regulation and suppression of heat and mass transfer using a rotating cylinder in a 3D cavity by varying thermal buoyancy at unity buoyancy ratio (N = 1) and mixed convection in the flow (Ri = 0.5, 1, 1.5).…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation on regulation and suppression of heat and mass transfer by varying thermal and solutal buoyancy force

Singh

Kannan²,

Nimmagadda³

et al. 2023

Eng. Res. Express

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In this study, a three-dimensional numerical analysis is presented for regulation and suppression of heat and mass transfer by varying thermal and solutal buoyancy force with a rotating cylinder placed at the center of the cavity. The energy and concentration equations are coupled by Dufour and Soret parameters to have mutual effect of concentration and temperature on heat and mass transfer. The thermal buoyancy in the flow is adjusted by varying Rayleigh number of Ra = 104, 105, 106 and the mixed convection in the flow is regulated by varying Richardson number of Ri = 0.5, 1, 1.5 at unity buoyancy ratio (N = 1), Soret number, Lewis number and Dufour number. The present heat and mass transfer solver is developed and validated using the open-source computational fluid dynamics (CFD) package OpenFOAM 5.0. The two vertical opposite sides of the cavity are maintained as isothermal and isosolutal (iso-concentration), and the remaining four surfaces with rotating cylinder are kept as adiabatic. The present analysis reveals the impact of mutual coupling of heat and mass transfer with the presence of thermal buoyancy, solutal buoyancy including mixed convection flow. The increase in the forced circulation at fixed thermal and solutal buoyancy force increases the heat and mass transfer. The variation of Nuavg and Shavg is observed to be steady even with increasing Ra, then changes to periodic and chaotic with implementation of rotating cylinder. The detailed analysis on the variation of thermal buoyancy at unity buoyancy ratio, forced convection is reported by plotting streamlines, temperature and concentration contours, average Nusselt and Sherwood number.

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Section: Introductionmentioning

confidence: 99%