Transient deformation and evaporation of droplets at intermediate Reynolds numbers

Haywood, R. J.; Renksizbulut, Metin; Raithby, G. D.

doi:10.1016/0017-9310(94)90186-4

Cited by 43 publications

(9 citation statements)

References 27 publications

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“…(see e.g. [64,66,[358][359][360][361][362][363][364][365]), their analytical solutions (see e.g. [366]) and asymptotic analyses in the limiting cases (see e.g.…”

Section: Coupled Solutionsmentioning

confidence: 99%

Advanced models of fuel droplet heating and evaporation

Sazhin

2006

Progress in Energy and Combustion Science

702

428

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“…(see e.g. [64,66,[358][359][360][361][362][363][364][365]), their analytical solutions (see e.g. [366]) and asymptotic analyses in the limiting cases (see e.g.…”

Section: Coupled Solutionsmentioning

confidence: 99%

Advanced models of fuel droplet heating and evaporation

Sazhin

2006

Progress in Energy and Combustion Science

702

428

View full text Add to dashboard Cite

“…Regarding the coupled problem of droplet breakup and evaporation, this has not yet been studied in detail except in the CFD works of [55][56][57][58][59][60]. Haywood et al [55,56] showed that for droplets under steady or unsteady (oscillatory) deformation, the quasi-steady correlations for Nusselt (Nu) and Sherwood (Sh) numbers are still valid when a volume-equivalent diameter is used, Mao et al [57] showed that the mass transfer from deformed droplets is mainly controlled by the Peclet (Pe) number, while the We number has a small impact only at high Pe numbers. Hase and Weigand [58] studied the effect of droplet deformation on the heat transfer enhancement and they found that this increases due to the oscillatory droplet motion and the increased surface area of the deformed droplets; moreover, the steady-state classical correlations for the Nu number, under-predict the heat transfer at the beginning of the simulation.…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic breakup of an n -decane droplet in a high temperature gas environment

Strotos

Malgarinos

Νikolopoulos

et al. 2016

Fuel

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The aerodynamic droplet breakup under the influence of heating and evaporation is studied numerically by solving the Navier-Stokes, energy and transport of species conservation equations; the VOF methodology is utilized in order to capture the liquid-air interphase. The conditions examined refer to an n-decane droplet with Weber numbers in the range 15-90 and gas phase temperatures in the range 600-1000K at atmospheric pressure. To assess the effect of heating, the same cases are also examined under isothermal conditions and assuming constant physical properties of the liquid and surrounding air. Under non-isothermal conditions, the surface tension coefficient decreases due to the droplet heat-up and promotes breakup. This is more evident for the cases of lower Weber number and higher gas phase 2 temperature. The present results are also compared against previously published ones for a more volatile n-heptane droplet and reveal that fuels with a lower volatility are more prone to breakup. A 0-D model accounting for the temporal variation of the heat/mass transfer numbers is proposed, able to predict with sufficient accuracy the thermal behavior of the deformed droplet.

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“…The first was used by Renksizbulut and Yuen [ 1] with the moving mesh method to simulate droplet evaporation, where variable properties on evaporation were also investigated [2], Haywood etal. [3] used a similar model where deformed droplets are considered.…”

Section: Introductionmentioning

confidence: 99%

Multirelaxation-time lattice Boltzmann model for droplet heating and evaporation under forced convection

2015

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We investigate the evaporation of a droplet surrounded by superheated vapor with relative motion between phases. The evaporating droplet is a challenging process, as one must take into account the transport of mass, momentum, and heat. Here a lattice Boltzmann method is employed where phase change is controlled by a nonideal equation of state. First, numerical simulations are compared to the D(2) law for a vaporizing static droplet and good agreement is observed. Results are then presented for a droplet in a Lagrangian frame under a superheated vapor flow. Evaporation is described in terms of the temperature difference between liquid-vapor and the inertial forces. The internal liquid circulation driven by surface-shear stresses due to convection enhances the evaporation rate. Numerical simulations demonstrate that for higher Reynolds numbers, the dynamics of vaporization flux can be significantly affected, which may cause an oscillatory behavior on the droplet evaporation. The droplet-wake interaction and local mass flux are discussed in detail.

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Transient deformation and evaporation of droplets at intermediate Reynolds numbers

Cited by 43 publications

References 27 publications

Advanced models of fuel droplet heating and evaporation

Advanced models of fuel droplet heating and evaporation

Aerodynamic breakup of an n -decane droplet in a high temperature gas environment

Multirelaxation-time lattice Boltzmann model for droplet heating and evaporation under forced convection

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