Enhance the mixing performance of water and ethanol at micro level using geometrical modifications

Shinde, Anil B.; Patil, Aakash; Patil, Veeranagouda

doi:10.1016/j.matpr.2020.10.265

Cited by 5 publications

(3 citation statements)

References 40 publications

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“…Where W and H are the mixing channel width and height, respectively. The mixing index is calculated by using the following equations [39]- [40].…”

Section: Simulation Setup and Numerical Methodologymentioning

confidence: 99%

Numerical Investigation of Liquid–Liquid Mixing in Modified T Mixer with 3D Obstacles

Mahmud

2021

J. eng. adv.

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The fluids inside passive micromixers are laminar in nature and mixing depends primarily on diffusion. Hence mixing efficiency is generally low, and requires a long channel length and longtime compare to active mixers. Various designs of complex channel structures with/without obstacles and three-dimensional geometries have been investigated in the past to obtain an efficient mixing in passive mixers. This work presents a design of a modified T mixer. To enhance the mixing performance, circular and hexagonal obstacles are introduced inside the modified T mixer. Numerical investigation on mixing and flow characteristics in microchannels is carried out using the computational fluid dynamics (CFD) software ANSYS 15. Mixing in the channels has been analyzed by using Navier–Stokes equations with water-water for a wide range of the Reynolds numbers from 1 to 500. The results show that the modified T mixer with circular obstacles has far better mixing performance than the modified T mixer without obstacles. The reason is that fluids' path length becomes longer due to the presence of obstacles which gives fluids more time to diffuse. For all cases, the modified T mixer with circular obstacle yields the best mixing efficiency (more than 60%) at all examined Reynolds numbers. It is also clear that efficiency increase with axial length. Efficiency can be simply improved by adding extra mixing units to provide adequate mixing. The value of the pressure drop is the lowest for the modified T mixer because there is no obstacle inside the channel. Modified T mixer and modified T mixer with circular obstacle have the lowest and highest mixing cost, respectively. Therefore, the current design of modified T with circular obstacles can act as an effective and simple passive mixing device for various micromixing applications.

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“…Where W and H are the mixing channel width and height, respectively. The mixing index is calculated by using the following equations [39]- [40].…”

Section: Simulation Setup and Numerical Methodologymentioning

confidence: 99%

Numerical Investigation of Liquid–Liquid Mixing in Modified T Mixer with 3D Obstacles

Mahmud

2021

J. eng. adv.

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“…This mass flux is imitated by the impression of concentration gradients, pressure gradients, etc. The governing equations are illustrated in Shinde et al (2021) and indicated in equations ( 4) to (6) as: ∇𝑣 = 0 Since the dye is diluted in water in a very small quantity, so characteristics of both water and water dye will be approx. same.…”

Section: Simulation Accessorymentioning

confidence: 99%

“…Saleel et al (2020) analyzed the impose of changing the height of a rectangular block in a micromixer in the concern of Electro-osmotic flow. Shinde et al (2021) examined mixing quality of SARM having U-form, V-form, and square C-form pillars located in a microchannel. Shimizu and Uetsuji (2022) proposed two drive modes single and double Metal-capped bimorph actuator (MC-BMP) and compared the mixing index and flow rate with conventional BMP (Bimorph).…”

Section: Introductionmentioning

confidence: 99%

Design and Simulation of the Spiral Micromixer with Chaotic Advection

2023

JAFM

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In recent years, the microfluidics technique has screwed up rising attention and be in progress a fascinating topic. Species mixing is a compelling part of any microfluidic system that abides by the major challenge. In this research, a relative explication of mixing quality of microchannels of two cross-sections square and circular in spiral form is presented by numerical simulation. To perform the visitation, geometric parameters like axial length of microchannels and hydraulic diameter are taken equal for both cases. Computational Fluid Dynamics codes unriddle the Continuity equation, Navier-Stokes equation, and Convection-Diffusion equation. Explication of fluid flow and mixing have been gone through with an extensive limit of Reynolds numbers 1 to 125. The results explicate that the circular section spiral microchannel affords a higher mixing quality admixed to the square section spiral microchannel. Furthermore, in the circumstance of circular section spiral micromixer, mixing index esteem has attained 92% at Re =125. For both section micromixer, the esteem of mixing index enhancement be contingent on Reynolds numbers. For both cases, pressure downfall has been computed for microchannels of similar lengths. The esteem of pressure downfall in square section spiral mixer is excess than circular section spiral mixer. The simulation outcomes exhibited that the circular section spiral micromixer is an effective design for microfluidic devices like Lab on a chip (LOC).

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Simulation analysis of mixing quality in T-junction micromixer with bend mixing channel

Prakash

Zunaid

Samsher

2021

Materials Today: Proceedings

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Enhance the mixing performance of water and ethanol at micro level using geometrical modifications

Cited by 5 publications

References 40 publications

Numerical Investigation of Liquid–Liquid Mixing in Modified T Mixer with 3D Obstacles

Numerical Investigation of Liquid–Liquid Mixing in Modified T Mixer with 3D Obstacles

Design and Simulation of the Spiral Micromixer with Chaotic Advection

Simulation analysis of mixing quality in T-junction micromixer with bend mixing channel

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