Characterization of enhanced liquid mixing in T‐T mixer at various Reynolds numbers

Dundi, Manoj; V.R.K, Raju; Chandramohan, V.P.

doi:10.1002/apj.2298

Cited by 5 publications

(6 citation statements)

References 31 publications

(44 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This was due to the fact that the design of T–T mixer facilitates overlapping of vortices pertaining to different samples (Figure 8b), which is not possible with the design of T‐mixer as only one sample is allowed from each side (Figure 8a). A more detailed study on the comparison of mixing phenomenon of conventional T and T–T mixers can be found in Dundi et al 21 …”

Section: Resultsmentioning

confidence: 99%

“…They found a considerably improved mixing performance by T–T mixer at higher Re (flow rates greater than 8 ml min −1 ) compared to T‐mixer. Dundi et al 21 numerically evaluated the mixing phenomenon in T–T mixer and characterized the flow behavior of the device at various Re in the range of 0 to 700. It was observed that the T–T mixer design facilitates the use of symmetrical four‐vortex regime to the advantage of the mixing enhancement.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Simple structured and highly efficient passive T‐type micromixer with circumferential in‐step at entry

Dundi

Raju

Chandramohan

2021

Asia-Pacific J Chem Eng

Self Cite

View full text Add to dashboard Cite

Many micromixing applications require simple structured passive mixers rather than complex structured passive or expensive active mixers. However, mixing quality in a typical simple structured passive mixer remains poor. In the present work, simple T‐type micromixer is modified with a circumferential in‐step at the entry of inlet channels to generate velocity components oblique to the mainstream inlet flow. The performance of T and T–T mixers with and without circumferential in‐step has been estimated for various Re (0 to 700). Results showed that inlet sample flow achieved velocity components of three‐dimensional nature with circumferential in‐step, leading to a momentous degree of intertwinement and entanglement of samples during the collision at the confluence of inlet channels. As a result, a remarkable improvement in mixing is obtained in the presence of in‐step for sufficiently higher flow rates of Re above 100 by T‐mixer and Re above 300 by T–T mixer. In particular, T‐mixer offers better advantage with in‐step compared to T–T mixer; marking an improvement for Re as low as 100 and above, as well as exhibiting shorter mixing lengths. Therefore, the present design of simple structured T‐mixer with in‐step at entry can be an effective device for various micromixing applications.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simple structured and highly efficient passive T‐type micromixer with circumferential in‐step at entry

Dundi

Raju

Chandramohan

2021

Asia-Pacific J Chem Eng

Self Cite

View full text Add to dashboard Cite

show abstract

“…Figure 2. Grid independence study and validation (a) Average axial velocity profiles at outlet of T-micromixer for different meshes, (b) Mixing quality at outlet of T-micromixer for different meshes and (c) Comparison of Mixing quality with various Reynolds number for T-mixer of the present study and Dundi et al17 …”

mentioning

confidence: 79%

“…The governing equations of the flow field and species transport of the T-mixer have been solved in this study using conditions comparable to those used by Dundi et al 17 To validate the accuracy of the current numerical scheme, the results obtained were compared to the results of Dundi et al 17 Equations ( 4) and ( 5) were used to assess mixing quality at the T-mixer outlet. Figure 2(c) shows that the current study's findings are in close accord with those of Dundi et al 17…”

Section: Validationmentioning

confidence: 99%

Mixing enhancement of passive type T-mixer through shape optimization

Rampalli

Vivekanand

Das

2022

Proceedings of the Institution of Mechanical Engineers, Part E:

View full text Add to dashboard Cite

This study looked at optimizing the geometrical shape of a simple T-mixer using Bernstein polynomials-based shape optimization technique to improve the mixing of the T-mixer. Passive micromixers of planar geometry are preferred in a wide range of applications such as lab-on-chips and chemical processing applications, due to their ease of fabrication and low processing costs. Studies conducted on T-mixers have revealed that the performance of T-mixers at low Re (<30) is dismal. At low Reynolds number flows, the mixing is completely dominated by diffusion because of laminar flow conditions. In the present work, an attempt to improve the mixing performance of the T-mixer was made and a nearly three-fold improvement in performance was reported. The adjoint-based shape optimization technique was employed to optimize the wall profile without losing the advantage of the ease of fabrication. The T-mixer boundaries were represented parametrically using Bernstein polynomials that could take any shape within a constrained plane. Different shapes can be generated for different polynomial orders. A limit on the minimum channel thickness (60 microns) was imposed, while the inlet and outlet boundary lengths were fixed. For this particular geometry, the 12th-order polynomial exhibits an optimized shape for maximum mixing performance. The optimized shape of the T-mixer also shows significant improvement in mixing compared to a conventional T-mixer with a reduced channel thickness of 60 microns.

show abstract

“…It was found that the mixing effect can be improved when the apical angle of the triangle is increased. On the other hand, Dundi et al 27 studied the liquid mixing in a T–T mixer. Instead of having two inlets into the mixing channel, T–T mixer possesses four inlets, which is reported to have higher mixing performance over a wide range of Re (i.e., 0 < Re < 750).…”

Section: Introductionmentioning

confidence: 99%

Enhanced liquid mixing in T‐mixer having staggered fins

Tan

Ismail

et al. 2020

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

The present study considers computational evaluation of mixing performance in a T-mixer having staggered fins. A novel arrangement consisting of two pairs of staggered fins is incorporated and placed close to the entrance of the mixing channel. A parametric study is performed to examine the effects arising from the geometric and flow parameters alteration. With respect to all the parameters investigated, the presence of staggered fins consistently give rise to better mixing performance as compared with that without fin. With the presence of fins, flow of liquid with different species concentrations is redirected and aligned with the angle of inclination θ of the fins, creating lateral convection that disrupt the flow. This promotes better mixing of liquids. At Re = 1, staggered fins arrangement with θ = 45 , enhancement in mixing efficiency can reach as high as 33.3% as compared with that of without fin. It is also interesting to note that liquid mixing enhancement is significant at higher Reynolds numbers (1 ≤ Re ≤ 10) as compared with that of low Reynolds value

show abstract

Characterization of enhanced liquid mixing in T‐T mixer at various Reynolds numbers

Cited by 5 publications

References 31 publications

Simple structured and highly efficient passive T‐type micromixer with circumferential in‐step at entry

Simple structured and highly efficient passive T‐type micromixer with circumferential in‐step at entry

Mixing enhancement of passive type T-mixer through shape optimization

Enhanced liquid mixing in T‐mixer having staggered fins

Contact Info

Product

Resources

About