Numerical simulation of turbulent fluid flow and heat transfer characteristics in heat exchangers fitted with porous media

Yang, Yue-Tzu; Hwang, Ming-Lu

doi:10.1016/j.ijheatmasstransfer.2009.02.024

Cited by 91 publications

(57 citation statements)

References 39 publications

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“…The strength of vortex also becomes weaker. All of these findings are in good agreement with the previous studies (Nithiarasu et al, 1997;Oltean et al, 2008;Yang and Hwang, 2009). …”

Section: Resultssupporting

confidence: 93%

“…The fundamental interest comes from the concern to understand the mass transfer mechanism (Pascal, 1988;Bekri andAdler, 2002, Chan et al, 2007) and fluid flow behavior through variable porosity of the media (Davis and Flame, 1996;Joseph et al, 2002). On the other hand, a similar interest was provoked by the wide range of engineering applications utilizing this type of phenomenon (Oltean et al, 2008;Yang and Hwang, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Numerical Investigation of Incompressible Fluid Flow through Porous Media in a Lid-Driven Square Cavity

Irwan

Fudhail

Azwadi³

et al. 2010

American Journal of Applied Sciences

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Problem statement: Investigation of fluid flow behavior through porous media in a liddriven square cavity. Approach: The Brinkman-Forcheimer equation is coupled with the lattice Boltzmann formulation to predict the velocity field in the system. Three numerical experiments were preformed with different values of Darcy number to investigate the effect of porosity on the fluid flow.Results: In the current study, we found that the magnitude of velocity, strength of vortex and velocity boundary layer is significantly affected porosity of the media. Conclusion: The lattice Boltzmann simulation scheme is capable in prediction of fluid flow behavior through porous media.

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“…The strength of vortex also becomes weaker. All of these findings are in good agreement with the previous studies (Nithiarasu et al, 1997;Oltean et al, 2008;Yang and Hwang, 2009). …”

Section: Resultssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Incompressible Fluid Flow through Porous Media in a Lid-Driven Square Cavity

Irwan

Fudhail

Azwadi³

et al. 2010

American Journal of Applied Sciences

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“…A local thermal equilibrium (LTE) assumption is usually assumed to exist between solid and fluid phase when the volumetric heat transfer coefficient is high and there is no heat released in the fluid or solid phase [39,40]. Therefore, LTE is assumed in our work.…”

Section: Governing Equationsmentioning

confidence: 99%

Numerical heat transfer analysis of transcritical hydrocarbon fuel flow in a tube partially filled with porous media

et al. 2016

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Hydrocarbon fuel has been widely used in airbreathing scramjets and liquid rocket engines as coolant and propellant. However, possible heat transfer deterioration and threats from local high heat flux area in scramjet make heat transfer enhancement essential. In this work, 2-D steady numerical simulation was carried out to study different schemes of heat transfer enhancement based on a partially filled porous media in a tube. Both boundary and central layouts were analyzed and effects of gradient porous media were also compared. The results show that heat transfer in the transcritical area is enhanced at least 3 times with the current configuration compared to the clear tube. Besides, the proper use of gradient porous media also enhances the heat transfer compared to homogenous porous media, which could help to avoid possible overtemperature in the thermal protection.

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“…Indeed, improvements of interphase heat transfer rates are reported when using porous materials, as a result of the increase of the contact area between fluid and solid (Konstatinou et al 1997;Alkam & Al-Nimr 1999;Furberg et al 2009;Yang & Hwang 2009;Dyga & Placzek 2010). This increase leads to an enhancement in the thermal conductivity of the system.…”

Section: Introductionmentioning

confidence: 99%

Asymptotic analysis of a Hiemenz flow in a low-porosity medium with phase change

Kokubun

Fachini

2012

J. Fluid Mech.

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In the present work, the features of liquid evaporation inside a low-porosity medium subjected to an impinging stream of hot gas is investigated analytically. The flow is analysed for a non-Darcy model, in which viscous and convective terms are considered in the Darcy pressure equation. A low-volatility liquid is considered, so that a low-vaporization regime is established. The rates of heat transfer between gas and solid and between liquid and solid are assumed to be high. Owing to differences between phase properties, in the system under study, different physical processes occur at different length scales. Using asymptotic expansions, expressions for the three phases that occur in this problem are obtained, in each of their length scales. The results predict that high injection temperatures are needed for phase change to occur, as a result of the low volatility of the liquid. Likewise, the enhancement of the vaporization rate due to heat conduction in the porous medium is quantified. The Hiemenz flow pressure term is modified to incorporate the effect of the porous medium, which is necessary for a solution to be found.

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Numerical simulation of turbulent fluid flow and heat transfer characteristics in heat exchangers fitted with porous media

Cited by 91 publications

References 39 publications

Numerical Investigation of Incompressible Fluid Flow through Porous Media in a Lid-Driven Square Cavity

Numerical Investigation of Incompressible Fluid Flow through Porous Media in a Lid-Driven Square Cavity

Numerical heat transfer analysis of transcritical hydrocarbon fuel flow in a tube partially filled with porous media

Asymptotic analysis of a Hiemenz flow in a low-porosity medium with phase change

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