RST model for turbulent flow and heat transfer mechanism in an outward convex corrugated tube

Han, Haoxue; Li, Bingxi; Li, Feng‐Chen; He, Yaning

doi:10.1016/j.compfluid.2013.12.012

Cited by 19 publications

(3 citation statements)

References 27 publications

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“…Therefore, the outward convex corrugated tubes are selected in our research work to overcome this kind of difficulty and obtain heat transfer augmentation efficacy as well. Han et al [20] transfer and flow characteristic with the effect of the various structures in outward convex corrugated tubes recently. From above mentioned researches, most studies are concerned with the symmetrical type corrugated tube (SCT) so far.…”

Section: Introductionmentioning

confidence: 98%

Effect of flow direction for flow and heat transfer characteristics in outward convex asymmetrical corrugated tubes

Han

Shao

2016

International Journal of Heat and Mass Transfer

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Section: Introductionmentioning

confidence: 98%

Effect of flow direction for flow and heat transfer characteristics in outward convex asymmetrical corrugated tubes

Han

Shao

2016

International Journal of Heat and Mass Transfer

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“…This was due to the fact that concentration ratio increased which lead to higher outlet temperature. Huai-Zhi et al [11] numerically investigated the heat transfer mechanism on outward convex corrugated tube geometry. Reynolds stress transport (RST) model was used to analyze the stresses induced on fluid flowing through receiver tube which ultimately effects on the heat transfer rate.…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis of parabolic trough collector system with multiple receiver geometries and reflective materials

et al. 2021

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Solar parabolic trough collector systems provide an attractive solution especially for solar thermal power generation. The performance of these systems significantly depends on receiver geometries. Therefore, in the current study, an experimental analysis has been performed using three different receiver geometries along-with two reflective materials. These receiver geometries include: simple tube (reference geometry A), receiver tube with straight absorber plate (geometry B) and receiver tube with curved absorber plate (geometry C); whereas, the reflective materials include: aluminum and Stainless steel. The experimentation was performed under subtropical climate conditions of Taxila, Pakistan. From experimentation, it was identified that peak heat gain obtained from receiver geometries C and B were 71 %, and 30 % higher as compared to the reference geometry A respectively. The, thermal efficiency of the system with geometry A was 20 %, geometry B was 28 % and geometry C was 34 %. Furthermore, two reflective materials i.e. aluminum and Stainless steel were used on geometry C which yielded best results for further PTC performance analysis. It was observed that peak thermal efficiencies were 34.8 % and 31 % with aluminum and stainless steel as reflector materials. The results indicated that aluminum reflector was approx. 12 % efficient as compared to stainless steel reflector. The results will help to cultivate the advantages of innovative receiver geometries and alternative reflective materials.

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“…Suffers from inherent limitations on the isotropic eddy-viscosity model. Good at being used for aerodynamic simulations determining the skin-coefficient (best at being used for the wall elements of turbulence) RSTHan et al (2014)…”

mentioning

confidence: 99%

Investigation Into the Hydrodynamic Processes of Fitting Connections for Determining Pressure Losses of Transport Hydraulic Drive

Karpenko

Bogdevičius

2020

Transport

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The article presents the findings of theoretical and experimental research on hydraulic processes occurring in the hydraulic drives of transport machines. The paper analyses the influence of hydrodynamic processes on the flow characteristics of fluid considering different hydraulic fitting connections. The performed analysis is based on numerical simulations using Navier–Stokes equations for the velocity field. The dynamics of fluid flow in the hydraulic system has been investigated taking into account the main parameters like system flow rate in the range of 5 to 100 L/min, the diameter of the pipeline making 1/2” and fitting standards DKOL, ORFS, BSP and JIS. As a result, pressure drop, power losses, resistance and flow coefficients at different fitting connections have been obtained. The article compares the provided results with the findings given employing the calculation method for the standard of equivalent length fitting. To simulate fluid flow, a mesh independence study and turbulence calculations have been performed. Simulation results have been examined conducting physical experiments on measuring pressure losses. Each experimental research includes three measurements of connections bearing in mind each fitting standard.

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RST model for turbulent flow and heat transfer mechanism in an outward convex corrugated tube

Cited by 19 publications

References 27 publications

Effect of flow direction for flow and heat transfer characteristics in outward convex asymmetrical corrugated tubes

Effect of flow direction for flow and heat transfer characteristics in outward convex asymmetrical corrugated tubes

Experimental analysis of parabolic trough collector system with multiple receiver geometries and reflective materials

Investigation Into the Hydrodynamic Processes of Fitting Connections for Determining Pressure Losses of Transport Hydraulic Drive

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