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You searched for subject:(staggered herringbone). Showing records 1 – 2 of 2 total matches.

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Brno University of Technology

1. Abrahám, Martin. Návrh mikrofluidického směšovače .

Degree: 2016, Brno University of Technology

Mikrofluidická zařízení jsou stále častěji používána v oblasti medicíny, jelikož využívají pouze malých množství pracovních vzorků jako např. krve či reagenčních chemikálií. Pro práci s danými látkami mnohdy vyžadujeme efektivního smísení a zde nastává hlavní problém v mikrofluidických systémech. Z důvodu malých rozměrů je zde proudění pouze laminární a na mísení se tedy nepodílejí turbulentní víry, ale jen molekulární difuzivita.; Microfluidic devices are more frequently being used in medicine as they operate with small amounts of test samples, such as blood or reagent chemicals. To work with such substances, effective mixing of the solution is usually required, which emerged as the most challenging problem in microfluidic systems. Due to the minor dimensions of the devices only laminar flow occurs, thus the turbulent eddies do not contribute to the mixing, but only the molecular diffusivity. Advisors/Committee Members: Rudolf, Pavel (advisor).

Subjects/Keywords: Mikrofluidika; Reynoldsovo číslo; laminární proudění; aktivní mísení; pasivní mísení; mikromísiče; CFD; Fluent; Staggered herringbone mixer; Microfluidics; Reynold’s number; laminar flow; active mixing; passive mixing; micromixer; CFD; Fluent; Staggered herringbone mixer

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Abrahám, M. (2016). Návrh mikrofluidického směšovače . (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/58995

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Abrahám, Martin. “Návrh mikrofluidického směšovače .” 2016. Thesis, Brno University of Technology. Accessed November 24, 2017. http://hdl.handle.net/11012/58995.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Abrahám, Martin. “Návrh mikrofluidického směšovače .” 2016. Web. 24 Nov 2017.

Vancouver:

Abrahám M. Návrh mikrofluidického směšovače . [Internet] [Thesis]. Brno University of Technology; 2016. [cited 2017 Nov 24]. Available from: http://hdl.handle.net/11012/58995.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Abrahám M. Návrh mikrofluidického směšovače . [Thesis]. Brno University of Technology; 2016. Available from: http://hdl.handle.net/11012/58995

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

2. Hama, Brian. Evaluation of a Microfluidic Mixer Utilizing Staggered Herringbone Channels: A Computational Fluid Dynamics Approach.

Degree: MSin Chemical Engineering, Washkewicz College of Engineering, 2017, Cleveland State University

Microfluidic platforms offer a variety of advantages including improved heat transfer, low working volumes, ease of scale-up, and strong user control on parameters. However, flow within microfluidic channels occurs at low Reynolds numbers, which makes mixing difficult to accomplish. Adding V-shaped ridges to channel walls, a pattern called the staggered herringbone design (SHB), might alleviate this problem by introducing transverse flow patterns that enable enhanced mixing. However, certain factors affecting the SHB mixer’s performance remain largely unexplored.In this work, a microfluidic mixer utilizing the SHB geometry was developed and characterized using computational fluid dynamics based simulations and complimentary experiments. A channel design with SHB ridges was simulated in COMSOL Multiphysics under a variety of operating conditions to evaluate its mixing capabilities. The device was fabricated using soft-lithography to experimentally observe the mixing process. The mixing was visualized by pumping fluorescent dyes through the device and imaging the channels using a confocal microscope.The device was found to efficiently mix fluids rapidly, based on both simulations and experiments. Varying the Reynolds number or component diffusion coefficients had a weak effect on the mixing profile, due to the laminar flow regime and insufficient residence time, respectively. Mixing effectiveness decreased as the component flow rate ratio increased. Fluid flow patterns visualized in confocal microscope images were highly identical to the simulated results, suggesting that the simulations serve as good predictors of the device’s performance. This SHB mixer design would be a good candidate for further implementation as a reactor. Advisors/Committee Members: Kothapalli, Chandra (Committee Chair).

Subjects/Keywords: Chemical Engineering; microfluidics; mixing; computational fluid dynamics; comsol; staggered herringbone

…the staggered herringbone (SHB) geometry37, which is similar to the SGM and CGM… …direction 13 of flow) is referred to as the reverse staggered herringbone mixer38. The… …22 2.4 Enlarged view of herringbone ridges with dimensions indicated ..… 22 x 2.5… …staggered - which means that a set of ridges in one direction is followed by a set of 11 ridges… …in the opposite direction, or non-staggered- in which the same ridge is simply repeated… 

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Hama, B. (2017). Evaluation of a Microfluidic Mixer Utilizing Staggered Herringbone Channels: A Computational Fluid Dynamics Approach. (Masters Thesis). Cleveland State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=csu1503954013980881

Chicago Manual of Style (16th Edition):

Hama, Brian. “Evaluation of a Microfluidic Mixer Utilizing Staggered Herringbone Channels: A Computational Fluid Dynamics Approach.” 2017. Masters Thesis, Cleveland State University. Accessed November 24, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=csu1503954013980881.

MLA Handbook (7th Edition):

Hama, Brian. “Evaluation of a Microfluidic Mixer Utilizing Staggered Herringbone Channels: A Computational Fluid Dynamics Approach.” 2017. Web. 24 Nov 2017.

Vancouver:

Hama B. Evaluation of a Microfluidic Mixer Utilizing Staggered Herringbone Channels: A Computational Fluid Dynamics Approach. [Internet] [Masters thesis]. Cleveland State University; 2017. [cited 2017 Nov 24]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=csu1503954013980881.

Council of Science Editors:

Hama B. Evaluation of a Microfluidic Mixer Utilizing Staggered Herringbone Channels: A Computational Fluid Dynamics Approach. [Masters Thesis]. Cleveland State University; 2017. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=csu1503954013980881

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