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Keywords: pressure drop
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Proceedings Papers

Proc. ASME. ICNMM2020, ASME 2020 18th International Conference on Nanochannels, Microchannels, and Minichannels, V001T03A001, July 13–15, 2020
Paper No: ICNMM2020-1033
.... The pressure drop penalty increased with mass flux. Compared with smooth tube, the pressure drop penalty of enhanced tube was larger. Keywords: condensation, heat transfer coefficient, pressure drop, enhanced tube. NOMENCLATURE Variable A area, m2 cp specific heat capacity, J kg-1 K-1 d tube diameter, m f...
Proceedings Papers

Proc. ASME. ICNMM2019, ASME 2019 17th International Conference on Nanochannels, Microchannels, and Minichannels, V001T01A003, June 23–26, 2019
Paper No: ICNMM2019-4254
... Abstract Plates with corrugated walls are used in plate heat exchangers for heat transfer enhancement usually at the expense of the fluid friction. In this paper, the effects of varying channel lengths and corrugation angles on the pressure drop in corrugated rib channels are examined. Water...
Proceedings Papers

Proc. ASME. ICNMM2019, ASME 2019 17th International Conference on Nanochannels, Microchannels, and Minichannels, V001T02A004, June 23–26, 2019
Paper No: ICNMM2019-4219
... Abstract This paper presents an experimental study on pressure drop using non-boiling liquid-liquid Taylor flow in mini scale coiled and curved tubing. Experiments were carried out to measure the pressure drop characteristics by varying the numbers of turns in coiled tubes and the lengths...
Proceedings Papers

Proc. ASME. ICNMM2012, ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels, 411-417, July 8–12, 2012
Paper No: ICNMM2012-73199
... Pressure drop through micro-pillar-integrated mini/microchannels is studied experimentally and analytically. Following our previous studies, the low aspect ratio micropillars embedded in a microchannel are modeled as a porous medium sandwiched between channel walls. The pressure drop...
Proceedings Papers

Proc. ASME. ICNMM2011, ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels, Volume 2, 615-628, June 19–22, 2011
Paper No: ICNMM2011-58294
... Pressure Drop Optimal Geometry Complex Geometry Single Phase Flow Microchannels Minichannels Laminar Flow Proceedings of the ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels ICNMM2011-58294 June 19-22, 2011 Edmonton, Alberta, CANADA GENERALIZED MODELS...
Proceedings Papers

Proc. ASME. ICNMM2010, ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels: Parts A and B, 887-891, August 1–5, 2010
Paper No: FEDSM-ICNMM2010-30588
.... It is found that the pressure drops across the designed micro nozzles/diffusers are increased considerably when the obstacle or fin structure are added. The resultant maximum flow rates are 42.08 mm 3 /s and 50.15 mm 3 /s for conventional micro nozzle/diffuser and added two-fin structure in micro nozzle...
Proceedings Papers

Proc. ASME. ICNMM2010, ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels: Parts A and B, 1731-1739, August 1–5, 2010
Paper No: FEDSM-ICNMM2010-31021
... Experiments have been performed to investigate two-phase pressure drop in a circular vertical mini-channel made of stainless steel (AISI 316) with internal diameter of 1.70 mm and a uniformly heated length of 245 mm using ammonia as working fluid. The experiments are conducted for heat flux...
Proceedings Papers

Proc. ASME. ICNMM2010, ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels: Parts A and B, 1629-1638, August 1–5, 2010
Paper No: FEDSM-ICNMM2010-30276
... aspects such as slug formation, slug shape, flow pattern, pressure drop and heat transfer are of interest. According to this review, there are some large gaps in the research literature, including pressure drop and heat transfer in liquid-liquid slug flows. Gaps in research are also found in applications...
Proceedings Papers

Proc. ASME. ICNMM2009, ASME 2009 7th International Conference on Nanochannels, Microchannels and Minichannels, 581-588, June 22–24, 2009
Paper No: ICNMM2009-82209
... The evaporation heat transfer coefficients and pressure drops of R-410A and R-134a flowing through a horizontal-aluminium rectangular multiport mini-channel having a hydraulic diameter of 3.48 mm are experimentally investigated. The test runs are done at refrigerant mass fluxes ranging between...
Proceedings Papers

Proc. ASME. ICNMM2009, ASME 2009 7th International Conference on Nanochannels, Microchannels and Minichannels, 739-743, June 22–24, 2009
Paper No: ICNMM2009-82163
... This study characterizes and analyzes the performances of micro diffusers/nozzles with six types of enhancement structures. The pressure drops across the designed micro nozzles/diffusers are found to be increased considerably when the obstacle and fin structure are added. Further, the micro...
Proceedings Papers

Proc. ASME. ICNMM2007, ASME 5th International Conference on Nanochannels, Microchannels, and Minichannels, 427-433, June 18–20, 2007
Paper No: ICNMM2007-30109
.... In this research, an automatic shape optimization system based on the adjoint variable method is developed using C language on a Windows platform. To validate the effectiveness of the developed system, pressure drop minimization problems of a 180° curved microchannel and a branched microchannel in incompressible...
Proceedings Papers

Proc. ASME. ICMM2005, ASME 3rd International Conference on Microchannels and Minichannels, Parts A and B, 577-584, June 13–15, 2005
Paper No: ICMM2005-75042
... was then started and increased stepwise. The second series of experiments was performed with the microchannel saturated with a constant water flow rate. Oil injection was then started and increased stepwise. When the steady state was reached for each experiment, the flow rate and the pressure drop were measured...
Proceedings Papers

Proc. ASME. ICMM2005, ASME 3rd International Conference on Microchannels and Minichannels, Parts A and B, 493-501, June 13–15, 2005
Paper No: ICMM2005-75072
... enhancement heat transfer efficiency thermal power pressure drop exper micro KEY M heat t INTR H of sa availa transf conve M could therm excha magn techn One Proceedings of ICMM2005 3rd International Conference on Microchannels and Minichannels June 13-15, 2005, Toronto, Ontario, Canadand of split...
Proceedings Papers

Proc. ASME. ICMM2005, ASME 3rd International Conference on Microchannels and Minichannels, Part B cont’d, 199-207, June 13–15, 2005
Paper No: ICMM2005-75027
.... It is demonstrated that the impingement liquid coolers outperform thermally the baseline pin fin cooler, and with significantly lower pressure drops. The impingement liquid coolers could also be easily modified to trade reduced pressure drop against higher flowrate or reduced thermal performance. A scaling model has...