Computational study of multiphase flows over ventilated translating blades

Daskiran, Cosan; Liu, I-Han; Öztekin, Alparslan

doi:10.1016/j.ijheatmasstransfer.2017.03.038

Cited by 8 publications

(2 citation statements)

References 28 publications

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“…By defining the mass transfer coefficient, the unidirectional gas-to-liquid dissolved mathematical models were applied to the numerical simulations. 11–13 After verifying Zhou et al's 14 bubble column reactors experiment, Daskiran et al 15 conducted multiphase dynamics simulations in ventilated translating blades. The results demonstrated that the dissolved oxygen level is higher in regions with intense vortex activities.…”

Section: Introductionmentioning

confidence: 99%

Dissolution and evolution effects on pressure fluctuations in a space micropump

Ren

Hao

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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The purpose of this paper is to reveal the dynamic mass transfer effects between gas and liquid on pressure fluctuations in a space micropump using our proposed computational model of gas–liquid mass transfer. Complex dissolution and evolution processes were applied to achieve accurate dynamic gas–liquid mass transfer predictions in the micropump. The validation of experiments was conducted by measuring the performance characteristics of the micropump, and the mass transfer model was verified by a dissolved oxygen concentration experiment in plug discharge flow. Based on this, four conditions including unsteady single-phase, two-phase without mass transfer, dissolution, and coexisting dissolved–released flows calculations are discussed to clarify the frequency contents, generation reasons, and propagation law. Combined with entropy production analysis, the pressure fluctuation influenced by the dissolution and evolution is illustrated. The results exhibit that the evolution of the gas is located on the head of the long blade suction surface in the impeller. When a unidirectional gas-to-liquid dissolution process occurs, the fluctuating amplitude of the characteristic dominant 5 fn is significantly weakened; otherwise, when dissolution and evolution coexist, the amplitude is significantly promoted as the released gas increase the flow instability. In addition, the distributions of local high entropy production induced by mean and fluctuating velocity gradients overlap that of large mass transfer rates and high amplitude of the mixing frequency in the volute, exhibiting the relationship between entropy production, mass transfer, and flow instability. The current study provides a guidance that the dissolved gases’ concentration must be controlled strictly to avoid the evolution of gas for the safety and stability of the space hydraulic system.

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Section: Introductionmentioning

confidence: 99%

Dissolution and evolution effects on pressure fluctuations in a space micropump

Ren

Hao

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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“…The fluid is suspended with the nanoparticles bounded by a stretchable heated surface. In addition to all above mentioned studies by various researchers with their adopted approaches, several investigations relevant to this presented endeavor have been listed in [15][16][17][18][19][20][21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Mathematical Models of Electro-Magnetohydrodynamic Multiphase Flows Synthesis with Nano-Sized Hafnium Particles

2018

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Featured Application: This model can be used to design and engineer for nozzle or diffuser type of injectors in the latest models of automobiles to improve their performance and reduce the consumption of fuel. Abstract:The multiphase fluid flow under the influence of electro-magnetohydrodynamics (EHD) is investigated in this study. The base fluid contains hafnium particles. Two illustrative models namely fluid phase and particulate phase are considered for three different geometries having great importance in both industrial and mechanical usage. The impact of pertinent parameters from different aspects is illustrated graphically with requisite discussion keeping in view their physical aspects. The stream lines are also erected to highlight their physical importance regarding the flow patterns. In addition, the paper is terminated by making a comparison with the existing literature as a limiting case of considered problem to confirm the validations of achieved results and hence found in excellent agreement. This model can be used to design and engineer for nozzle or diffuser type of injectors in the latest models of automobiles to improve their performance and reduce the consumption of fuel.

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