Heat Transfer in Microchannels With Suspended Solid Particles: Lattice-Boltzmann Based Computations

This paper presents computational results on the effect of fixed or suspended cylindrical solid particles on heat transfer in a channel flow. The computational method is based on the solution of the lattice-Boltzmann equation for the fluid flow, coupled with the energy equation for thermal transport and the Newtonian dynamic equations for direct simulation of suspended particle transport. The effects of Reynolds number, particle-to-channel size ratio, and the eccentricity of the particle on heat transfer from the channel walls for single and multi-particles are presented. The multi-particle flow condition represents a case with solid particles suspended in the cooling medium, such as in micro/nanofluids, to augment heat transfer. The results provide insight into the mechanism by which suspended particles can change the rate of heat transfer in a microchannel.

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Heat Transfer Characteristics of Suspension Flow Inside a Microchannel

Volume 8: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A and B ◽

10.1115/imece2007-43408 ◽

2007 ◽

Cited By ~ 3

Author(s):

Reza H. Khiabani ◽

Yogendra Joshi ◽

Cyrus Aidun

Keyword(s):

Heat Transfer ◽

Lattice Boltzmann ◽

Energy Equation ◽

Suspended Particle ◽

Suspended Solid ◽

Solid Particles ◽

Computational Method ◽

Newtonian Dynamics ◽

Cylindrical Solid ◽

Insight Into

This paper presents computational results on the effect of suspended cylindrical solid particles in channel flow on the rate of heat transfer. The results provide insight into the effect of suspended solid particles on the rate of heat transfer. The computational method is based on the solution of the lattice-Boltzmann equation for the fluid flow, coupled with the energy equation for thermal transport and the Newtonian dynamics equations for direct simulation of suspended particle transport. The effects of Reynolds number, particle-to-channel size ratio and the eccentricity of the particle on heat transfer from the channel walls for single and multiparticles are presented. The multiparticle flow condition represents a case with solid particles suspended in the cooling medium, such as in micro/nanofluids, to augment heat transfer. The results provide insight into the mechanism by which suspended particles can effectively change the rate of heat transfer in a microchannel.

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Convective Heat Transfer in a Channel in the Presence of Solid Particles

ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference, Volume 1 ◽

10.1115/ht2007-32458 ◽

2007 ◽

Cited By ~ 1

Author(s):

Reza H. Khiabani ◽

Yogendra Joshi ◽

Cyrus Aidun

Keyword(s):

Heat Transfer ◽

Lattice Boltzmann ◽

Energy Equation ◽

Suspended Particles ◽

Solid Particles ◽

Computational Method ◽

Transfer Enhancement ◽

Nusselt Numbers ◽

Cylindrical Solid ◽

Boltzmann Method

In this paper, the effect of cylindrical solid particles suspended in liquid on the rate of heat transfer in a channel is studied. The computational method is based on the lattice-Boltzmann method for the fluid flow and the energy equation. The effects of Reynolds number, particle-to-channel size ratio, location of the particle, and the eccentricity of the particle on heat transfer from the channel walls are considered. The effect of moving particles is also considered on the heat transfer enhancement by simulating several suspended particles moving with the fluid. This latter condition represents a case with solid particles suspended in the cooling medium such as in micro/nanofluids. The results provide insight in the mechanism by which suspended particles can effectively change the rate of heat transfer in a channel. The local and average wall Nusselt numbers are presented for these conditions.

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Thermal three-dimensional Lattice Boltzmann simulations of suspended solid particles in microchannels

International Journal of Heat and Mass Transfer ◽

10.1016/j.ijheatmasstransfer.2013.06.005 ◽

2013 ◽

Vol 65 ◽

pp. 235-243 ◽

Cited By ~ 16

Author(s):

Zahra Hashemi ◽

Omid Abouali ◽

Reza Kamali

Keyword(s):

Lattice Boltzmann ◽

Three Dimensional ◽

Suspended Solid ◽

Solid Particles ◽

Dimensional Lattice ◽

Lattice Boltzmann Simulations ◽

Suspended Solid Particles

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Multiple-Relaxation-Time Lattice Boltzmann Simulation of Flow and Heat Transfer in Porous Volumetric Solar Receivers

Journal of Energy Resources Technology ◽

10.1115/1.4039775 ◽

2018 ◽

Vol 140 (8) ◽

Cited By ~ 13

Author(s):

Wandong Zhao ◽

Ying Zhang ◽

Ben Xu ◽

Peisheng Li ◽

Zhaotai Wang ◽

...

Keyword(s):

Heat Transfer ◽

Relaxation Time ◽

Thermal Diffusivity ◽

Pore Structure ◽

Lattice Boltzmann ◽

Solid Particles ◽

Maximum Temperature ◽

Porous Structures ◽

Flow And Heat Transfer ◽

Multiple Relaxation Time

The flow and heat transfer (FHT) in porous volumetric solar receiver was investigated through a double-distributed thermally coupled multiple-relaxation-time (MRT) lattice Boltzmann model (LBM) in this study. The MRT-LBM model was first verified by simulating the FHT in Sierpinski carpet fractal porous media and compared with the results from computational fluid dynamics (CFD). Three typical porous structures in volumetric solar receivers were developed and constructed, and then the FHT in these three porous structures were investigated using the MRT-LBM model. The effects of pore structure, Reynolds (Re) number based on air velocity at inlet, the porosity, and the thermal diffusivity of solid matrix were discussed. It was found that type-III pore structure among the three typical porous structures has the best heat transfer performance because of its lowest maximum temperature of solid particles at the inlet and the highest average temperature of air at the outlet, under the same porosity and heat flux density. Furthermore, increasing the thermal diffusivity of solid particles will lead to higher averaged air temperature at the outlet. It is hoped that the simulation results will be beneficial to the solar thermal community when designing the solar receivers in concentrated solar power (CSP) applications.

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Insight into Foam Pore Effect on Phase Change Process in a Plane Channel under Forced Convection Using the Thermal Lattice Boltzmann Method

Energies ◽

10.3390/en13153979 ◽

2020 ◽

Vol 13 (15) ◽

pp. 3979

Author(s):

Riheb Mabrouk ◽

Hassane Naji ◽

Hacen Dhahri ◽

Zohir Younsi

Keyword(s):

Heat Transfer ◽

Phase Change ◽

Lattice Boltzmann Method ◽

Forced Convection ◽

Lattice Boltzmann ◽

Change Process ◽

Porous Channel ◽

Boltzmann Method ◽

Thermal Lattice Boltzmann ◽

Insight Into

In this work, the two-dimensional laminar flow and the heat transfer in an open-ended rectangular porous channel (metal foam) including a phase change material (PCM; paraffin) under forced convection were numerically investigated. To gain further insight into the foam pore effect on charging/discharging processes, the Darcy–Brinkmann–Forchheimer (DBF) unsteady flow model and that with two temperature equations based on the local thermal non-equilibrium (LTNE) were solved at the representative elementary volume (REV) scale. The enthalpy-based thermal lattice Boltzmann method (TLBM) with triple distribution function (TDF) was employed at the REV scale to perform simulations for different porosities (0.7≤ε≤0.9) and pore per inch (PPI) density (10≤PPI≤60) at Reynolds numbers (Re) of 200 and 400. It turned out that increasing Re with high porosity and PPI (0.9 and 60) speeds up the melting process, while, at low PPI and porosity (10 and 0.7), the complete melting time increases. In addition, during the charging process, increasing the PPI with a small porosity (0.7) weakens the forced convection in the first two-thirds of the channel. However, the increase in PPI with large porosity and high Re number limits the forced convection while improving the heat transfer. To sum up, the study findings clearly evidence the foam pore effect on the phase change process under unsteady forced convection in a PCM-saturated porous channel under local thermal non-equilibrium (LTNE).

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Application of the Immersed Boundary Method and Direct Numerical Simulation for the Heat Transfer From Particles

Volume 1: Symposia, Parts A, B and C ◽

10.1115/fedsm2009-78493 ◽

2009 ◽

Author(s):

Zhi-Gang Feng ◽

Efstathios E. Michaelides

Keyword(s):

Heat Transfer ◽

Numerical Simulation ◽

Direct Numerical Simulation ◽

Density Function ◽

Fluid Phase ◽

Solid Particles ◽

Computational Method ◽

Immersed Boundary ◽

Force Density ◽

Particulate Flows

A combination of the Direct Numerical Simulation (DNS) with the Immersed Boundary (IB) method has been developed to solve the momentum and heat transfer equations for the computation of thermal convection in particulate flows. This numerical method makes use of a finite difference method in and uses a regular Eulerian grid to solve the modified momentum and energy equations for the entire flow region simultaneously. In the region that is occupied by the solid particles, a second particle-based Lagrangian grid is used, which tracks all the particles, and a force density function or an energy density function is introduced to represent the momentum interaction or thermal interaction between the particulate phase and fluid phase. The numerical methods presented have been validated by comparing the results of the simulation with similar numerical results obtained by others. Among the advantages of this computational method is that it may be used for the determination, stipulation and validation of boundary conditions in particulate flows that may be used with larger Eulerian codes.

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Lattice Boltzmann Simulation of Suspended Solid Particles in Microchannels

ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels, Volume 2 ◽

10.1115/icnmm2011-58244 ◽

2011 ◽

Author(s):

Zahra Hashemi ◽

Omid Abouali ◽

Reza Kamali

Keyword(s):

Fluid Flow ◽

Lattice Boltzmann ◽

Three Dimensional ◽

Suspended Solid ◽

Solid Particles ◽

Lattice Boltzmann Model ◽

Momentum Exchange ◽

Rectangular Microchannel ◽

Exchange Method ◽

Suspended Solid Particles

The current paper presents a 3D Lattice Boltzmann model for numerical simulation of the interaction of the suspended solid particles with the flow field in microchannels. Three-dimensional fluid flow computation is performed using a 19-bit single-relaxation-time Lattice Boltzmann method (D3Q19), while the Newtonian dynamic equations are solved to investigate the transport of the suspended solid particles. The needed forces in equations of the particle motion are evaluated by the momentum exchange method. The effects of solid particles with various diameters on the fluid flow at different Reynolds numbers in a rectangular microchannel are also investigated and discussed.

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