Interactions between two oscillating bubbles in a rigid tube

Zou, Jun; Li, Bo; Chen, Ji

doi:10.1016/j.expthermflusci.2014.10.021

Cited by 15 publications

(7 citation statements)

References 20 publications

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“…Also, literature [16,17] started from the distribution state and the compound mode of different damping values and explored the stability mechanisms and capacity evaluation systems of pressure valves based on compound damping control. Literature [18][19][20] analyzed the collision mode of the cone and the valve seat, established a stable region diagram of the cone valve vibration, and revealed the mutual transfer law of axial energy and radial energy. Considering some factors, such as the distributed parameter characteristics of pipelines, the nonlinear collision between the cone and the valve seat, the viscous force of the fluid, and the interaction between the cavitation and the cone, a criterion for determining the criterium for bidirectional vibration stability of the cone valve was established.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Dynamic Characteristics of Pressure-Regulating and Pressure-Limiting Combined Relief Valve

Shi

Wang

et al. 2021

Mathematical Problems in Engineering

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Aiming at the problem of the lack of a cooperation mechanism of combined relief valves, this paper proposes a new pressure-regulating and pressure-limiting combined relief valve. Combined with the ordinary relief valve dynamic characteristic analysis method, the dynamic model of the combined relief valve under normal working conditions was established, and its dynamic characteristics were simulated using Simulink. The results showed that the multi-pressure stabilization design of the combined relief valve improves its usability and stability. Under the same structural parameters, the overshoot of the combined relief valve was 5.7%, and the response time was 12 ms, which is better than the ordinary relief valve. Besides, it effectively improves the instability problems, such as the vibration and the large pressure fluctuation of the ordinary relief valve under high pressure and large flow conditions. When the sum of the effective force area on the upper side of the flange of the pressure-regulating valve core and the area of the tail vertebra is equal to the effective force area of the lower side of the flange of the pressure-regulating valve core, the dynamic performance of the relief valve is optimal. For example, if the effective force area under the flange is 1.8 cm2, then the inlet pressure overshoot is 2.8%, and the response time is 10 ms. An appropriate volume of the sensitive cavity, the quality of the valve core, and the fluid resistance of the pressure relief valve are factors that can effectively improve the dynamic performance of the pressure-regulating and pressure-limiting combined relief valve.

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Section: Introductionmentioning

confidence: 99%

Analysis of Dynamic Characteristics of Pressure-Regulating and Pressure-Limiting Combined Relief Valve

Shi

Wang

et al. 2021

Mathematical Problems in Engineering

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“…Cavitation bubbles have numerous behaviors near different boundaries such as free surface [1,2], rigid boundary [3], elastic boundary [4,5], and so on [6]. When a single bubble collapses near a solid boundary, it will produce a collapsing jet.…”

Section: Introductionmentioning

confidence: 99%

Gas Removal by a Spark-Generated Bubble in a Rigid Tube

Chen

Zou

et al. 2018

Proceedings of the 10th International Symposium on Cavitation (CAV2018)

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An experimental investigation of the interactions between a spark-generated bubble and a gas slug in a narrow tube is studied. The growth and collapse of the vapor bubble are recorded with the help of high-speed photography. The behavior of the trapped gas slug is affected by the dynamics of the vapor bubble in the rigid tube. In this paper, the complicated interactions of two bubbles are revealed. It is found that the direction of the post-collapse flow depends on the relative position of the vapor bubble in the tube. Likewise, the velocity of gas removal is associated with the relative positions and sizes of the bubbles. The pressure generated by the collapse of the vapor bubble plays an important role in propelling the gas out. At last the directions of the post-collapse flow are summarized. A brief "Pumping effect" in the narrow tube is discussed, which is useful for gas removal in practice. These results may be beneficial for the cavitation applications.

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“…Some of them utilize asymmetric nozzle-diffuser geometries [6,7] while others use multiple heaters to create asymmetric heating [8,9] or a traveling vapor plug [10,11,12,13,14]. A more recent development is the inertial pump that relies on dynamic asymmetry of the bubble's expansion-collapse cycle when a microheater is located close to one end of a channel [15,16,17,18,19,20]. Such pumps have characteristic sizes from several microns to hundreds of microns.…”

mentioning

confidence: 99%

“…Even without intricate details of bubble generation and interaction in solid-wall tubes [20,22,23], the physics of inertial pumping is complex. Net flow is a result of a subtle imbalance of mechanical momenta of two fluidic columns colliding when the vapor bubble collapses [16,17,18].…”

mentioning

confidence: 99%

Single-pulse dynamics and flow rates of inertial micropumps

Govyadinov¹,

Kornilovitch²,

Markel³

et al. 2016

Microfluid Nanofluid

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Bubble-driven inertial pumps are a novel method of moving liquids through microchannels. We combine high-speed imaging, computational fluid dynamics (CFD) simulations and an effective one-dimensional model to study the fundamentals of inertial pumping. For the first time, single-pulse transient flow through Ushaped microchannels is imaged over the entire pump cycle with 4-µs temporal resolution. Observations confirm the fundamental N-shape flow profile predicted earlier by theory and simulations. Experimental flow rates are used to calibrate the CFD and one-dimensional models to extract an effective bubble strength. Then the frequency dependence of inertial pumping is studied both experimentally and numerically. The pump efficiency is found to gradually decrease once the successive pulses start to overlap in time.

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Interactions between two oscillating bubbles in a rigid tube

Cited by 15 publications

References 20 publications

Analysis of Dynamic Characteristics of Pressure-Regulating and Pressure-Limiting Combined Relief Valve

Analysis of Dynamic Characteristics of Pressure-Regulating and Pressure-Limiting Combined Relief Valve

Gas Removal by a Spark-Generated Bubble in a Rigid Tube

Single-pulse dynamics and flow rates of inertial micropumps

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