Analysis and testing of a contraction-and-expansion micromixer for micromilled microfluidics

Date

2017-10-01

Author

Yıldırım, Ender

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

173
views

0
downloads

In this paper, numerical analysis and experimental investigation of a micromixer, which was specifically designed for microfluidic devices fabricated by micromilling, is presented. The mixer is composed of series of contractions and expansions in zigzag arrangement along a mixing channel. Mixers, fabricated by micromilling on polymethylmethacrylate (PMMA), were tested with %0.1 Ponceau 4R red food dye solution and distilled water. According to experiment results, over 70% mixing efficiency could be obtained for the flows with Reynolds number (Re) greater than 40. It was also numerically shown that by increasing the number of successive contractions and expansions, it could be possible to achieve over 80% mixing efficiency when Re = 55 for the species with diffusion coefficient of 5 x 10(-9) m(2)/s. Although the micromixer was specifically designed for micromilling, it is expected that the mixer can be useful in any microfluidic device fabricated by any other technique.

Subject Keywords

Driven, Mixer

URI

https://hdl.handle.net/11511/49291

Journal

MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS

DOI

https://doi.org/10.1007/s00542-017-3291-2

Collections

Department of Mechanical Engineering, Article

Suggestions

OpenMETU
Core

Supporting Simulation Experiments with Megamodeling Cam, Sema; Dayibas, Orcun; Gorur, Bilge K.; Oğuztüzün, Mehmet Halit S.; Yilmaz, Levent; Chakladar, Sritika; Doud, Kyle; Smith, Alice E.; Teran-Somohano, Alejandro (SCITEPRESS, AV D MANUELL, 27A 2 ESQ, SETUBAL, 2910-595, PORTUGAL; 2018-01-01) Recent developments in computational science and engineering allow a great deal of experimental work to be conducted through computer simulation. In a simulation experiment, a model of the phenomena to be studied is run in a computing environment under varying model and environment settings. As models are adjusted to experimental procedures and execution environments, variations arise. Models also evolve in time. Thus, models must be managed. We propose to bring Global Model Management (GMM) to bear on simu...
Examination of the coping processes of caregivers of children with cancer Demirtepe Saygılı, Dilek; Bozo Özen, Özlem; Department of Psychology (2013) The general aim of the present dissertation was to examine the coping processes of the caregivers of children with cancer. It was composed of three studies, whose aims were (1) to reveal the predictors of caregiver distress by using the Transactional Theory of Coping among the caregivers of children with cancer; (2) to identify the factors associated with caregiving process from the caregiver’s perspective qualitatively; (3) to develop and implement an intervention program. Study 1 was conducted with 105 pa...
Comparative analysis of variability modelling approaches in component models Suloglu, Selma; Kaya, Muhammed Çağrı; Karamanlıoğlu, Alper; Entekhabi, Sina; Nikoo, Mahdi Saeedi; Tekinerdogan, Bedir; Doğru, Ali Hikmet (2018-12-01) The results of a systematic literature review conducted for variability modelling in software component models are analysed and presented here. A well-planned protocol guided the screening of 3230 papers that resulted in the identification of 55 papers. Reviewing these papers, 23 of them were considered as primary studies related to our research questions. A comparison framework is introduced to further understand, assess, and compare those selected papers. Observations about the important aspects of compon...
A procedure on ground motion selection and scaling for nonlinear response of simple structural systems Ay, Bekir Özer (2012-10-01) This study presents a ground-motion selection and scaling methodology that preserves the basic seismological features of the scaled records with reduced scatter in the nonlinear structural response. The methodology modifies each strong-motion recording with known fundamental seismological parameters using the estimations of ground-motion prediction equations for a given target hazard level. It provides robust estimations on target building response through scaled ground motions and calculates the dispersion...
Selection of design and operational parameters in spindle-holder-tool assemblies for maximum chatter stability by using a new analytical model Erturk, A.; Budak, E.; Özgüven, Hasan Nevzat (2007-07-01) In this paper, using the analytical model developed by the authors, the effects of certain system design and operational parameters on the tool point FRF, thus on the chatter stability are studied. Important conclusions are derived regarding the selection of the system parameters at the stage of machine tool design and during a practical application in order to increase chatter stability. It is demonstrated that the stability diagram for an application can be modified in a predictable manner in order to max...

Citation Formats

E. Yıldırım, “Analysis and testing of a contraction-and-expansion micromixer for micromilled microfluidics,” MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS, pp. 4797–4804, 2017, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/49291.