Heat transfer and friction factor of turbulent flow through a horizontal semi-circular duct

Berbish, N. S.; Moawed, M.; Ammar, Muhammad; Afifi, Raheleh

doi:10.1007/s00231-010-0727-y

Cited by 19 publications

(8 citation statements)

References 12 publications

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“…Although the well‐known Dittus‐Boelter and Gnielinski correlations have been widely used, the former has definite uncertainty and the latter is developed for fully developed flows. The Berbish correlation was developed for air flow inside a horizontal semicircular duct of 23 mm inner radius. The Nu obtained from the numerical data was compared with the empirical correlation (see Table ).…”

Section: Numerical Models and Methodsmentioning

confidence: 99%

Experimental and numerical study on thermal‐hydraulic performance of printed circuit heat exchanger for liquefied gas vaporization

Zhao

Chen

Zhang

et al. 2019

Energy Science & Engineering

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The thermal-hydraulic performance of printed circuit heat exchanger (PCHE) through an experimental vaporization process of supercritical nitrogen was investigated. The inlet temperature of supercritical nitrogen was controlled between 113 K and 129 K, while its pressure was controlled between 4.5 MPa and 6 MPa. The mass of supercritical nitrogen corresponds to the turbulent state on the cold side of PCHE, which was maintained at 299.94 kg/h. A numerical processing of the same supercritical nitrogen flow through a single channel of PCHE cold side was presented. The numerical results were validated by comparison with the experimental data. Both experimental and numerical results showed that the increased inlet supercritical nitrogen pressure improved the heat transfer performance and pressure drop decreased with increasing the pressure at the PCHE cold side. Furthermore, the Fanning friction coefficient (f) and the Nusselt number (Nu) of supercritical nitrogen flow obtained by numerical simulation and empirical correlation were compared. K E Y W O R D Snitrogen gasification, printed circuit heat exchanger, supercritical fluid, thermal-hydraulic performance How to cite this article: Zhao Z, Chen X, Zhang X, Ma X, Yang S. Experimental and numerical study on thermal-hydraulic performance of printed circuit heat exchanger for liquefied gas vaporization. Energy Sci Eng. 2020;8:426-440. https ://doi.

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Section: Numerical Models and Methodsmentioning

confidence: 99%

Experimental and numerical study on thermal‐hydraulic performance of printed circuit heat exchanger for liquefied gas vaporization

Zhao

Chen

Zhang

et al. 2019

Energy Science & Engineering

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“…If the flow channel is wavy or zigzag shaped, the correlations for wavy or zigzag shaped channel should be employed. However, the straight pipe is assumed in this study so that the friction factor correlation by Berbish et al [23] is employed to calculate the turbulent friction factor of semicircular straight pipe. The fully developed laminar friction factor [33] and turbulent friction factor of semicircular straight pipe are given by:…”

Section: Thermal Design Methods Of Crossflow Printed-circuit Heat Exchmentioning

confidence: 99%

Analytical Study on Thermal and Mechanical Design of Printed Circuit Heat Exchanger

Yoon

Sabharwall

Kim

2013

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The analytical methodologies for the thermal design, mechanical design, and cost estimation of printed circuit heat exchanger are presented in this study. Three flow arrangements for PCHE of parallel flow, countercurrent flow and crossflow are taken into account. For each flow arrangement, the analytical solution of temperature profile of heat exchanger is introduced. The size and cost of printed circuit heat exchangers for advanced small modular reactors are also presented using various coolants such as sodium, molten salts, helium, and water. viii ix SUMMARYPrinted Circuit Heat Exchanger (PCHE) is one of the candidate designs of Very High Temperature Reactor (VHTR) or Advanced High Temperature Reactor (AHTR) heat exchanger (HX). Fine grooves in the plate of PCHE are made by using the technique that is employed for making printed circuit board. This heat exchanger is formed by the diffusion bonding of stacked plates whose grooved surfaces are the flow paths. Thermal design of heat exchanger is required to determine the size and effectiveness of heat exchanger. To evaluate the structural integrity, mechanical design of heat exchanger must be investigated. In a previous study, the parallel/counter flow PCHE analysis code was developed. The methodologies for the thermal and mechanical design of parallel/counter flow PCHE used in previous study are also summarized in this report.The objective of this work is to develop the analysis code for the crossflow PCHE to determine the size and cost of crossflow PCHE for AHTR. The size of the crossflow PCHE is determined through thermal design process of heat exchanger. Two dimensional temperature profiles in primary and secondary sides of crossflow PCHE are obtained from the solution of analytical model of crossflow PCHE assuming a single pass, both with unmixed fluid, and no contribution from longitudinal heat conduction. The mechanical design of crossflow PCHE is to determine the criteria of geometric parameters of structure for maintaining the integrity of the heat exchanger. The method for mechanical design of crossflow PCHE is developed based on that of parallel/counter flow PCHE.To verify the developed code, the grid sensitivity test and effectiveness-number of transfer units (NTU) analysis were carried out. The grid sensitivity test for the developed code was performed to evaluate the effect of grid number on the result. The result of grid sensitivity test shows that the effect of grid number is negligible. The effectiveness-NTU analysis was carried out to verify the developed code. The calculated effectiveness by the code and -NTU correlation for crossflow heat exchanger shows a good agreement with each other.As a parametric study, uncertainty analyses for fluid properties and heat transfer correlation were performed. The uncertainty of fluid properties was investigated by assuming ±30% of uncertainty in fluid material properties. The result of uncertainty analysis shows that the uncertainty of fluid property was negligible in the thermal design of crossflow...

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“…An extensive review of forced convection flow in circular and non -circular duct cross -sections were presented by Shah and London [2], Kakaç et al [3] and Kakaç and Liu [4]. An experimental investigation was made by Berbish et al [5] for turbulent forced convection heat transfer and pressure drop characteristics of air flow inside a macro -level horizontal semi -circular cross -sectioned duct. Throughout the duct, variations of surface and mean temperatures, local heat transfer coefficient, local Nusselt number and local friction factor were presented.…”

Section: Introductionmentioning

confidence: 99%

CFD ANALYSIS OF LAMINAR FORCED CONVECTIVE HEAT TRANSFER FOR TiO2/WATER NANOFLUID IN A SEMI-CIRCULAR CROSS-SECTIONED MICRO-CHANNEL

Ekiciler¹

2019

Journal of Thermal Engineering

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In this study, forced convection flow and heat transfer characteristics of TiO2/water nanofluid flow with different nanoparticle volume fractions (1.0%, 2.0%, 3.0% and 4.0%) in semi-circular cross-sectioned micro-channel was numerically investigated. The threedimensional study was conducted under steady state laminar flow condition where Reynolds number changing from 100 to 1000. CFD model has been generated by using ANSYS FLUENT 15.0 software based on finite volume method. The flow was under hydrodynamically and thermally developing flow condition. Uniform surface heat flux boundary condition was applied at the bottom surface of the micro-channel. The average and local Nusselt number and Darcy friction factor values were obtained using numerical results. Also, the effects of using nanofluid on local values of Nusselt number and Darcy friction factor were investigated. Numerical results indicate that the increasing of nanoparticle volume fraction of nanofluid, the average Nusselt number increases; however, there is no significant variation in average Darcy friction factor.

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Heat transfer and friction factor of turbulent flow through a horizontal semi-circular duct

Cited by 19 publications

References 12 publications

Experimental and numerical study on thermal‐hydraulic performance of printed circuit heat exchanger for liquefied gas vaporization

Experimental and numerical study on thermal‐hydraulic performance of printed circuit heat exchanger for liquefied gas vaporization

Analytical Study on Thermal and Mechanical Design of Printed Circuit Heat Exchanger

CFD ANALYSIS OF LAMINAR FORCED CONVECTIVE HEAT TRANSFER FOR TiO2/WATER NANOFLUID IN A SEMI-CIRCULAR CROSS-SECTIONED MICRO-CHANNEL

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