Experimental and Numerical Investigation of Thermal-Hydraulic Characteristics of a Wavy-Channel Compact Heat Exchanger

Muley, Arun; Borghese, Joseph B.; Manglik, Raj M.; Kundu, Jaydeep

doi:10.1615/ihtc12.340

Cited by 8 publications

(4 citation statements)

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“…In the case of the wavy channel, the results are compared with data obtained by Muley et al [31]. The present results are in good agreement with [30,31]. In the case of nanofluid, results are compared with experimental results of Jung et al [13].…”

Section: Resultssupporting

confidence: 84%

“…In the case of nanofluid, results are compared with experimental results of Jung et al [13]. The agreement between the present method and the results of [13,30,31] has been shown in our previous work [24]. Also, the physics of the flow and temperature field in the wavy walls microchannels has been illustrated in our previous articles [7,24].…”

Section: Resultssupporting

confidence: 78%

“…In order to verify the accuracy of the present numerical study, the results in a fully developed region are validated against the analytical results for forced convection flow in straight square ducts by Tunc and Bayazitoglu [30]. In the case of the wavy channel, the results are compared with data obtained by Muley et al [31]. The present results are in good agreement with [30,31].…”

Section: Resultssupporting

confidence: 57%

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Heat transfer by nanofluids in wavy microchannels

Rostami

Abbassi

Harting

2018

Advanced Powder Technology

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a b s t r a c tPumping coolants through microchannels with well-defined structures along micro-electronic devices is a typical approach to remove the heat. It has been found recently that so-called nanofluids, i.e. dilute water-Cu or water-Al 2 O 3 suspensions with a particle diameter of 100-150 nm, are highly efficient coolants. Numerical simulations can help to optimize the microchannel structures and typically homogenous single-phase models are applied. However, these underestimate the experimental results. An alternative approach is two-phase models based on an Eulerian approach for the base fluid and a Lagrangian description of the suspended particles. In this paper we follow that route and solve the three-dimensional governing equations including continuity, Navier-Stokes and energy equations with the well-known SIMPLE method. The governing equations for particles are solved by a 4th order Runge-Kutta algorithm. We focus on a wavy microchannel structure and demonstrate that the disagreement between the two simulation approaches is due to the non-homogeneous particle distribution in the domain. We also find that the Nusselt number increases with the increase in volume fraction and the decrease in particle diameter and that it. is about three times higher for a nanofluid in a wavy microchannels as compared to water in a straight microchannels.

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Section: Resultssupporting

confidence: 84%

Section: Resultssupporting

confidence: 78%

Section: Resultssupporting

confidence: 57%

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Heat transfer by nanofluids in wavy microchannels

Rostami

Abbassi

Harting

2018

Advanced Powder Technology

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“…In another numerical work (Guzm an and Amon, 1996), but this time a three-dimensional (3D) study, they confirmed stream lines with the characteristics observed by Nishimura et al Rush et al (1999) conducted experimental tests to investigate the local heat transfer and flow behavior for the laminar and transitional flows in the sinusoidal wavy passages. Muley et al (2002) presented a steady state computational fluid dynamics (CFD) model to periodically simulate developed laminar flows in the wavy channel using a commercial code, FLUENT. They reported that the Colburn factor, j, and the Fanning friction factor, f, values were in an excellent agreement, within 710 percent, with experimental data.…”

Section: Liquids As the Working Fluidmentioning

confidence: 99%

New correlations for wavy plate-fin heat exchangers: different working fluids

Khoshvaght-Aliabadi

Hormozi

Rad

2014

International Journal of Numerical Methods for Heat &Amp; Fluid Flow

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Purpose – The main purpose of this paper is the generation of the heat transfer and pressure drop correlations by considering three working fluids, namely air, water, and ethylene glycol, for the wavy plate-fin heat exchangers (PFHEs). Design/methodology/approach – In order to present the general correlations, various models with different geometrical parameters should be tested. Because of the problems, such as difficult, long time, and costly fabrication of the wavy fins in experimental tests, computational fluid dynamics (CFD) calculations can be a useful method for the generation of the heat transfer and pressure drop correlations with eliminating the experimental problems. Hence, the effective design parameters of the wavy plate-fin, including fin pitch, fin height, wave length, fin thickness, wave amplitude, and fin length, and also their levels were recognized from the literature. The Taguchi method was applied to formulate the CFD simulation work. Findings – The simulation results were compared and validated with an available experimental data. The mean deviations of the Colburn factor, j, and Fanning friction factor, f, values between the simulation results and the experimental data were 3.74 and 9.07 percent, respectively. The presented air correlations and experimental data were in a good agreement, so that approximately 95 percent of the experimental data were correlated within ±12 percent. The j factor values varied for the different working fluids, while the f factor values did not sensibly change. Practical implications – The presented correlations can be used to estimate the thermal-hydraulic characteristics and to design of the compact PFHE with the wavy channels. Originality/value – This manuscript presents the new correlations for the compact PFHEs with the way channels by considering all the geometrical parameters and the working fluids with the different Prandtl numbers, 0.7, 7, and 150.

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