Numerical Study of Mixing Enhancement in a Supersonic Round Jet

A new design scheme is proposed for twisting the walls of a microchannel, and its performance is demonstrated numerically. The numerical study was carried out for a T-shaped microchannel with twist angles in the range of 0 to 34π. The Reynolds number range was 0.15 to 6. The T-shaped microchannel consists of two inlet branches and an outlet branch. The mixing performance was analyzed in terms of the degree of mixing and relative mixing cost. All numerical results show that the twisting scheme is an effective way to enhance the mixing in a T-shaped microchannel. The mixing enhancement is realized by the swirling of two fluids in the cross section and is more prominent as the Reynolds number decreases. The twist angle was optimized to maximize the DOM, which increases with the length of the outlet branch. The twist angle was also optimized in terms of the relative mixing. The two optimum twisting angles are generally not coincident. The optimum twist angle shows a dependence on the length of the outlet branch but it is not affected much by the Reynolds number.

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Numerical Study on the Effect of Innovative Vortex Generators in the Mixing Enhancement of Subsonic Jets

Lecture Notes in Mechanical Engineering - Proceedings of International Conference of Aerospace and Mechanical Engineering 2019 ◽

10.1007/978-981-15-4756-0_35 ◽

2020 ◽

pp. 411-420

Author(s):

S. Thanigaiarasu ◽

S. B. Jabez Richards ◽

V. Karthikeyan ◽

A. Muthuram ◽

Surendra Kumar Yadav ◽

...

Keyword(s):

Numerical Study ◽

Vortex Generators ◽

Mixing Enhancement

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Mixing enhancement in coaxial jets through inflow forcing: A numerical study

Physics of Fluids ◽

10.1063/1.2747680 ◽

2007 ◽

Vol 19 (7) ◽

pp. 075102 ◽

Cited By ~ 17

Author(s):

Guillaume Balarac ◽

Olivier Métais ◽

Marcel Lesieur

Keyword(s):

Numerical Study ◽

Mixing Enhancement ◽

Coaxial Jets

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Effects of Channel Wall Twisting on the Mixing in a T-Shaped Micro-Channel

Micromachines ◽

10.3390/mi11010026 ◽

2019 ◽

Vol 11 (1) ◽

pp. 26 ◽

Cited By ~ 2

Author(s):

Dong Jin Kang

Keyword(s):

Reynolds Number ◽

Cross Section ◽

Channel Wall ◽

Numerical Study ◽

Twist Angle ◽

Mixing Enhancement ◽

Micro Channel ◽

Number Range ◽

Mixing Performance ◽

Two Fluids

A new design scheme is proposed for twisting the walls of a microchannel, and its performance is demonstrated numerically. The numerical study was carried out for a T-shaped microchannel with twist angles in the range of 0 to 34π. The Reynolds number range was 0.15 to 6. The T-shaped microchannel consists of two inlet branches and an outlet branch. The mixing performance was analyzed in terms of the degree of mixing and relative mixing cost. All numerical results show that the twisting scheme is an effective way to enhance the mixing in a T-shaped microchannel. The mixing enhancement is realized by the swirling of two fluids in the cross section and is more prominent as the Reynolds number decreases. The twist angle was optimized to maximize the degree of mixing (DOM), which increases with the length of the outlet branch. The twist angle was also optimized in terms of the relative mixing cost (MC). The two optimum twisting angles are generally not coincident. The optimum twist angle shows a dependence on the length of the outlet branch but it is not affected much by the Reynolds number.

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