An experimental investigation of water flow in a rectangular T-channel with inner dimensions of 20 × 20 mm (inlet channel) and 20 × 40 mm (outlet mixing channel) has been conducted. The inlet Reynolds number Re, based on inlet hydraulic diameter, ranged from Re1 = 90 to 775. Inlet flow conditions were asymmetric, and inlet Re ratios of Re1/Re2 = 1.24, 1.65 and 2.45 were obtained by varying volumetric flow rate. Dynamical conditions and T-channel geometry are directly applicable to microscale mixing. Planar laser induced fluorescence (LIF) was used to characterize flow regimes and behaviors, including periodicity, in the inlet and outlet channels. Two distinct flow regimes were identified and characterized for asymmetric inlet Re. For low inlet Re, Re1 ≤ 150, and all Re1/Re2, flows were steady. For higher Re and all Re1/Re2, a jet flow regime, characterized by two counter rotating vortices and increasingly turbulent at higher Re dominated the flow in the junction. Qualitative mixing characteristics for all flow regimes, based on LIF visualizations in the outlet channel, are also presented.
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ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2012 Heat Transfer Summer Conference and the ASME 2012 Fluids Engineering Division Summer Meeting
July 8–12, 2012
Rio Grande, Puerto Rico, USA
Conference Sponsors:
- Heat Transfer Division
- Fluids Engineering Division
ISBN:
978-0-7918-4479-3
PROCEEDINGS PAPER
Experimental Investigation of Mixing in a T-Channel for Asymmetric Inlet Conditions
Manjunath Basavarajappa,
Manjunath Basavarajappa
University of Utah, Salt Lake City, UT
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John Elsnab,
John Elsnab
University of Utah, Salt Lake City, UT
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Susan Thomas,
Susan Thomas
University of Utah, Salt Lake City, UT
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Timothy A. Ameel
Timothy A. Ameel
University of Utah, Salt Lake City, UT
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Manjunath Basavarajappa
University of Utah, Salt Lake City, UT
John Elsnab
University of Utah, Salt Lake City, UT
Susan Thomas
University of Utah, Salt Lake City, UT
Timothy A. Ameel
University of Utah, Salt Lake City, UT
Paper No:
ICNMM2012-73277, pp. 489-499; 11 pages
Published Online:
July 22, 2013
Citation
Basavarajappa, M, Elsnab, J, Thomas, S, & Ameel, TA. "Experimental Investigation of Mixing in a T-Channel for Asymmetric Inlet Conditions." Proceedings of the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2012 Heat Transfer Summer Conference and the ASME 2012 Fluids Engineering Division Summer Meeting. ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels. Rio Grande, Puerto Rico, USA. July 8–12, 2012. pp. 489-499. ASME. https://doi.org/10.1115/ICNMM2012-73277
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