LBM simulation of piezo fan in square enclosure

Abstract

Purpose This paper aims to investigate the use of a piezo fan in an enclosure on wall heat transfer and thermal boundary layer profile in constant wall temperature situation. Design/methodology/approach The governing partial differential equations of mass, momentum and energy in addition to boundary conditions are solved by lattice Boltzmann method. The problem is solved numerically using D2Q9 population's model and Bhatnagar–Gross–Krook collision model with a code written in MATLAB. Findings The effects of Prandtl number (Pr) and the frequency of piezo fan vibrations are critically investigated on the hydrothermal characteristics of the square cavity. The mesh independency study and the validation of the proposed model are accomplished with numerical results of Ghia et al. (1982) and analytical solution of pure conduction very good agreement is found between present results and benchmark findings. Generally, with increasing beam frequency, the heat removal from heat source increased. It is found that, for all Prandtl numbers, wall Nusselt number will increase with the increase of the beam frequency. This enhancement is more intense in higher Prandtl number. Originality/value Based on these results, the use of piezo fan in an enclosure can be classified as standalone as well as heat sink integrated cooling solution.

Lattice Boltzmann Simulation of Ferrofluids Film Boiling

“…Various examinations have demonstrated that the grid Boltzmann technique is successful in contemplating the convection heat move under different field powers. References [16][17][18][19][20][21][22][23][24][25][26][27][28][29] in constrained convection, results uncovered that temperature inclination decreases with the ascent of Rayleigh number. In normal convection, the normal Nusselt number increments with the expansion of Rayleigh number and the lessening of Hartmann number.…”

“…LBM compared to MRT, has better accuracy, convergence, and stability. Jamalabadi [22] examined the warmth dispersal impact of ferrofluid regular convection in a slanted depression under the attractive field. Different Rayleigh numbers and slanted edges were considered, and slanted edge at 0 degrees and Rayleigh number at 10 4 ended up being the best circumstance for heat scattering.…”

“…Different Rayleigh numbers and slanted edges were considered, and slanted edge at 0 degrees and Rayleigh number at 10 4 ended up being the best circumstance for heat scattering. Jamalabadi [22] additionally examined the warmth dispersal impact of the characteristic convection of a ferrofluid in a cavity with direct temperature conveyance under an attractive field and found that the warm move diminishes by the augmentation of the nanoscale ferromagnetic molecule volume part for different Rayleigh numbers. Jamalabadi [22] recreated the warmth move and entropy age of MHD characteristic convection.…”

Novel Ideas for Thermal Management of Filament LED Light Bulbs

“…The produced fluid flow is the highest at zero deflection of the beam. The minimum is reached at the beam maximum amplitude [9]. A piezoelectric oscillating cantilever fan is a reliable, highly energy efficient, silent, reliable, simple constructed, inexpensive and has a long lifetime [10].…”

Coupling of a Nonlinear Structure with Sloshing

“…Yu et al [36] and Sun et al [37] performed classical nonlinear works on sloshing while the nonlinearity refers to the fluid part. Jamalabadi [38,39] solved the FSI problem in analytical sloshing, sloshing with the improved boundary layer approximation [40], sloshing with finite element [41,42], LBM [43], and sloshing with SPH method [44]. In many of studies a linear elastic model is adopted for solid part and focus of accuracy is on fluid section [36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51].…”