The pulse-elevator: A pump for granular materials

Li, Xuan; Worrall, Kevin; Vedanthu, Aditya; Scott-George, Andrew; Harkness, Patrick

doi:10.1016/j.actaastro.2022.07.052

Cited by 9 publications

(6 citation statements)

References 11 publications

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“…Движение пузырьковой структуры в условиях микрогравитации рассмотрено в [12]. Перенос гранулированных сред обсуждается в [13]. Нестационарное ламинарное распространение пламени в условиях невесомости в монодисперсной смеси газообразного окислителя с каплями жидкого топлива рассмотрено в [14].…”

Section: рис 2 капиллярная пропитка пористой среды со вставкойunclassified

“…Теперь рассмотрим скорость просачивания фазы α = 1. Подставляем в выражение (8) определение давления в фазе через среднее p и поправку ξ (11), пользуемся определениями относительных мобильностей (13). После этого пользуемся определением гидростатического давления (15), а затем обозначением (16), исключая градиент ξ. Затем подставляем (17), исключая градиент p. Замечательно, что выражение Γ j при этом сокращается, каким бы оно ни было:…”

Section: математическая модель капиллярной пропитки с учетом гистерезисаunclassified

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Effects of the Fluid Flow Front Instability as It Passes through a Porous Medium under Reduced Gravity and with Chemical Interactions between the Phases

Никитин,

Скрылева,

Манахова

2023

Успехи Кибернетики / Russian Journal of Cybernetics

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в работе рассматривается многофазное просачивание жидкости сквозь пористую среду. Обсуждаются вопросы неустойчивости границы раздела жидкостей. Предлагается математическая модель для описания процесса многократной пропитки пористой среды в условиях переменной гравитации. Модель учитывает гистерезис, используются различные модели капиллярного давления при пропитке и дренаже. Также в работе рассматривается метод моделирования неустойчивости путемпреобразования определяющих уравнений. Метод позволяет моделировать дополнительное размытие фронта пропитки. Рассматриваются результаты моделирования, основанного на данном методе, для капиллярной пропитки пористой среды в условиях микрогравитации, а также для случая, когда между фильтрующимися флюидами происходят химические взаимодействия. the paper considers the multiphase seepage of a liquid through a porous medium. We discussed the effects of instability of the liquid interface and proposed a simulation model for the multiple imbibition of the porous medium under variable gravity. The model includes the hysteresis, and various representations of capillary pressure are used during imbibition and drainage. The paper also considers the simulation of instability by transforming the constitutive equations. The method enables to simulate additional blurring of the imbibition front. The simulation results with this method for capillary imbibition of a porous medium under microgravity conditions, as well as for the case when chemical interactions occur between the seeping fluids, are presented.

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Section: рис 2 капиллярная пропитка пористой среды со вставкойunclassified

Section: математическая модель капиллярной пропитки с учетом гистерезисаunclassified

Effects of the Fluid Flow Front Instability as It Passes through a Porous Medium under Reduced Gravity and with Chemical Interactions between the Phases

Никитин,

Скрылева,

Манахова

2023

Успехи Кибернетики / Russian Journal of Cybernetics

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“…The Tesla valve, which was developed by Nikola Tesla [21] as a valve with no moving parts, is a device that causes fluid flows in one direction preferentially over another direction. Tesla valves have been successfully applied in a variety of engineering fields such as automotive design, air conditioning, medical nebulizers [27], heat transfer enhancement in microchannels [28], cooling electric vehicles [29], cooling lithiumion batteries [30], conveying particulate materials [31], etc. The design of these valves and working refrigerants are also very important in terms of low global warming potential (GWP) [12,32].…”

Section: Introductionmentioning

confidence: 99%

Analysis and Optimization of Multistage Tesla Valves by Computational Fluid Dynamics and a Multi‐Objective Genetic Algorithm

et al. 2022

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The multistage Tesla valve was optimized by minimizing the forward pressure drop (FPD) and maximizing the reverse pressure drop (RPD). First, computational fluid dynamics simulations were conducted; then, surrogate‐based optimization was done. Finally, an explicit correlation between the objective functions and the variables was developed to estimate the target functions directly. The results showed that decreasing the valve‐to‐valve distance over the hydraulic diameter (G/Dh) maximizes the diodicity (Di) and minimizes the FPD. When an increase in the RPD is desired, the Reynolds number (Re) should be increased, which leads to an increase in the FPD. The maximized Di value is 1.811 for Dh = 0.821, G/Dh = 0.993, N = 16, tan(α) = 0.848, and Re = 173.03. However, the minimum value of the FPD and the maximum RPD were found as 194.72 Pa and 352.69 Pa, respectively.

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“…There are a few losses that happened in the pump system when handling viscous liquids. These losses that occurs in the system resulting in a decrease of pump efficiency and directly affected the pump performance [17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

“…The behavior of pump could be varies based on its mechanism [20][21][22][23][24][25][26][27]. In the study, an auger screw pump is designed and fabricated for the application of high viscosity liquid.…”

Section: Introductionmentioning

confidence: 99%

Analysis on Auger Pump Performance During Handling High Viscous Liquid

Alisha

Najwa²,

Jamaludin³

et al. 2022

JMMST

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Viscosity is one of the factors affecting the performance of the auger pump. An auger pump is positive-displacement (PD) pump that moves fluids and semi-solid material along the screw axis using one or more screws. The study is about the analysis of the performance of the auger pump when transferring various viscosity liquids. In the study, a pumping device with auger shaft is designed. The sample liquids chosen for the experiment oil and concentrated detergent that poses various viscosity. The viscosity is being identified roughly by Zahn Cup Method with the temperature kept constant at 26°C throughout the measurement. The performance of the auger pump can be accessed by altering the motor speed in order to get various reading for the flow rate and pressure. It is found in the study; flowrate is affected by viscosity with the increasing motor speed. The study proves that the auger pump can operate with viscosity of 770 cSt liquid.

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The pulse-elevator: A pump for granular materials

Cited by 9 publications

References 11 publications

Effects of the Fluid Flow Front Instability as It Passes through a Porous Medium under Reduced Gravity and with Chemical Interactions between the Phases

Effects of the Fluid Flow Front Instability as It Passes through a Porous Medium under Reduced Gravity and with Chemical Interactions between the Phases

Analysis and Optimization of Multistage Tesla Valves by Computational Fluid Dynamics and a Multi‐Objective Genetic Algorithm

Analysis on Auger Pump Performance During Handling High Viscous Liquid

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