Experimental investigation of vortex structure formation in a gas-vortex bioreactor

Naumov, I. V.; Gevorgiz, R. G.; Skripkin, Sergey; Sharifullin, B. R.

doi:10.1134/s0869864322050067

Cited by 3 publications

(3 citation statements)

References 11 publications

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“…Since there is a fixed rod on the cylinder axis, The images show the circulating motion of the liquid under the floating washer. At Ω > 720 rpm, the circulation cell in the liquid is shown to occupy the entire volume, unlike the configuration with a free surface of the liquid, where the circulation cell reaches the bottom at large Ω 22 . A strong flow in the axial area under the washer indicates that liquid is sucked into the central orifice of the washer.…”

Section: Resultsmentioning

confidence: 90%

“…At Ω > 720 rpm, the circulation cell in the liquid is shown to occupy the entire volume, unlike the configuration with a free surface of the liquid, where the circulation cell reaches the bottom at large Ω. 22 A strong flow in the axial area under the washer indicates that liquid is sucked into the central orifice of the washer. Let us consider another specific case: using the distilled water with a kinematic viscosity ν w = 1 mm 2 s -1 as a model liquid.…”

Section: 2mentioning

confidence: 93%

“…The vortex breakdown process is characterized by an abrupt deceleration along the axis of the vortex, which may lead to formation of a zone of reverse flows or a recirculation zone. 3,18 In an experimental study of swirling flows in a gas-vortex reactor, 21,22 it was found that, similar to the case of two rotating liquids, a strongly swirling jet is formed at the reactor axis. 20 Therefore, despite the advances achieved in the development of aerial vortex bioreactors, research in this direction is still ongoing.…”

Section: Introductionmentioning

confidence: 99%

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Experimental study of the topological flow transformations in an aerial vortex bioreactor with a floating washer

Naumov,

Gevorgiz,

Skripkin

et al. 2023

Biotechnology Journal

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BackgroundResearch into the flow structure in an aerial vortex bioreactor is relevant for developing the methods for growing cell cultures. Determining the optimal cultivation condition for a certain process is especially important in the case when such parameters of the medium as density and viscosity significantly change with the culture growth in the bioreactor.Methods and resultsThe research of the flow dynamic was carried out in an 8.5 L universal aerial vortex bioreactor, with a washer freely floating on its surface and stabilizing the motion of the working fluid. The regularities of the vortex motion of the culture medium have been determined by Particle Image Velocimetry depending on its volume and the intensity of rotation of the activator, generating vortex motion in the air.Conclusion: The observed vortex structure and its dynamics at increasing flow swirl intensity are established to coincide with the structure of a confined vortex flow in a cylindrical container with no washer for both single and two‐fluid configurations. This novel methodology of the flow optimization shows that an ascending swirling jet forms in the vicinity of the bioreactor axis, and a bubble‐like vortex breakdown forms in the axial region.

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Section: Resultsmentioning

confidence: 90%

Section: 2mentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental study of the topological flow transformations in an aerial vortex bioreactor with a floating washer

Naumov,

Gevorgiz,

Skripkin

et al. 2023

Biotechnology Journal

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Topological flow transformations in a universal vortex bioreactor

Naumov,

Gevorgiz,

Skripkin

et al. 2023

Chemical Engineering and Processing - Process Intensification

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Study of vortex throttle characteristics with adjustable resistance by rotation of the vortex chamber inlet channel

Levitsky

2024

International Journal of Turbo &Amp; Jet-Engines

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The study is aimed at obtaining and analyzing the flow and cavitation characteristics of the proposed control devices, which are in demand in control systems for aircraft and rocket engines, chemical and other technological processes that require a wide range of flow control at high pressure drops. The characteristics of vortex throttling devices with cylindrical and spherical chambers were obtained, providing flow control in the range of 0.1–25 kg/s. A change in flow rate in the range of 3.5–3.8 can be achieved by changing the flow swirl intensity without throttling the flow sections. When vortex devices operate, the threshold for the occurrence of cavitation shifts to the region of small values of P out /P in, and, starting from the values of the geometric characteristic A > 4.5, cavitation is absent throughout the entire range of flow control. The pressure drop at the inlet channel of the vortex chamber does not exceed 10–30 % of the total resistance of the device. The torque on the control roller is small, 1.8–2.8 Nm, regardless of the flow rate.

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Experimental investigation of vortex structure formation in a gas-vortex bioreactor

Cited by 3 publications

References 11 publications

Experimental study of the topological flow transformations in an aerial vortex bioreactor with a floating washer

Experimental study of the topological flow transformations in an aerial vortex bioreactor with a floating washer

Topological flow transformations in a universal vortex bioreactor

Study of vortex throttle characteristics with adjustable resistance by rotation of the vortex chamber inlet channel

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