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helical flow

Investigation of helical flow by using tracer technique

Investigation of helical flow by using tracer technique

... The flow through coiled tubes is, in practice, important for pipe systems, heat exchangers, chemical reactors, mixers of different gas components, ...observe flow parameters in the helical pipe ...

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Abnormal Haemodynamic Flow Patterns in Bicuspid Pulmonary Valve Disease

Abnormal Haemodynamic Flow Patterns in Bicuspid Pulmonary Valve Disease

... the helical flow pattern on WSS and wall ...haemodynamic flow disturbances in the pathophysiology of vessel dilation in bicuspid valve ...4D flow MRI and the clinical implication of our ...

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A Review on Helical Coil Heat Exchanger

A Review on Helical Coil Heat Exchanger

... that helical coil heat exchangers offer more effectiveness than conventional heat exchangers like straight tube, shell and tube, ...secondary flow development inside the helical tube, it offers more ...

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Flow dynamics in the human carotid artery: I  Preliminary observations using a transparent elastic model

Flow dynamics in the human carotid artery: I Preliminary observations using a transparent elastic model

... In the petrous internal carotid artery, the dye-opacified slipstreams began a helical flow pattern, and areas of flow reversal became apparent along the inner aspect lesser curvature of [r] ...

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Review on Study of Different parameters affecting Heat transfer in Helical Coil Heat Exchanger

Review on Study of Different parameters affecting Heat transfer in Helical Coil Heat Exchanger

... fluid flow, accelerates corrosion and will increase pressure drop across heat ...exchangers. Helical coil heat exchangers have shown significance enhancements in fouling behaviour of heat exchangers ...

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Secondary currents: Measurement and analysis

Secondary currents: Measurement and analysis

... the flow, which produces a circulation named secondary current. This flow, coupled with the longitudinal movement, causes a helical flow that forms or models the section into the curves ...

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Design study of a novel regenerative pump using experimental and numerical techniques

Design study of a novel regenerative pump using experimental and numerical techniques

... annular flow passage of the pump to determine the direction of the flow ...the helical streamlines when plotting the ...the flow from the pump is reduced ...the helical flow ...

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AN EXPLICIT AND CONTINUOUS FRICTION FACTOR CORRELATION FOR HELICAL TUBES WITH ARBITRARY ROUGHNESS

AN EXPLICIT AND CONTINUOUS FRICTION FACTOR CORRELATION FOR HELICAL TUBES WITH ARBITRARY ROUGHNESS

... smooth helical tubes In accordance with the procedure of many authors including Zigrang and Sylvester (1985), Brkic (2011), and Winning and Coole (2013), the Colebrook-White correlation is taken as a benchmark ...

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EXPERIMENTAL INVESTIGATION OF HELICAL COIL AND STRAIGHT TUBE HEAT EXCHANGER

EXPERIMENTAL INVESTIGATION OF HELICAL COIL AND STRAIGHT TUBE HEAT EXCHANGER

... engineering. Helical coil structure is very effective for heat exchangers because they have a large heat transfer area in a small space, with great heat transfer coefficients validate to straight tube heat ...

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VORTEX TUBE COOLING SYSTEM

VORTEX TUBE COOLING SYSTEM

... S.Rejin and H. thilkan [11] found performance of vortex tube refrigeration system by considering the effect of conical valve angle. A six type of conical valve were used tested for individual cold orifice. The procedure ...

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Performance Comparison of a Helical Coil Heat...

Performance Comparison of a Helical Coil Heat...

... DIW flow rate than on the condenser DIW flow ...DIW flow rate in the evaporator, the compressor work was shown to decrease, while the COP was shown to ...

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HEAT TRANSFER ANALYSIS IN HEAT EXCHANGER USING HELICAL BAFFLES

HEAT TRANSFER ANALYSIS IN HEAT EXCHANGER USING HELICAL BAFFLES

... of helical baffle heat exchangers was developed for the first time in ...The Helical baffle heat exchanger, also known as ‘Helix changer’, is a superior shell and tube exchanger solution that removes many ...

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Numerical evaluation of laminar heat transfer enhancement in nanofluid flow in coiled square tubes

Numerical evaluation of laminar heat transfer enhancement in nanofluid flow in coiled square tubes

... Convective heat transfer can be enhanced by active as well as passive methods. While the former usually pro- vide better enhancement, it requires additional external forces and/or equipment which can increase the com- ...

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1. Design of an Experimental Plug-Flow Helical Hydrokinetic Turbine for Power Generation in Kenya

1. Design of an Experimental Plug-Flow Helical Hydrokinetic Turbine for Power Generation in Kenya

... Electricity is a vital element for human development, yet 1.2 billion people have no access to it at all (IEA, 2010). In Kenya, most people live in rural areas, and only about 10% have access to electricity (Kamau et al, ...

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A REVIEW ON HEAT TRANSFER ENHANCEMENT TECHNIQUES OF HELICAL COIL HEAT EXCHANGER

A REVIEW ON HEAT TRANSFER ENHANCEMENT TECHNIQUES OF HELICAL COIL HEAT EXCHANGER

... industries. Helical coil configuration is very effective for heat exchangers and chemical reactors because they can accommodate a large heat transfer area in a small space, with high heat transfer ...the ...

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Experimental Analysis on Convective Heat Transfer through Helical Coil

Experimental Analysis on Convective Heat Transfer through Helical Coil

... the helical coil is such that, it must have maximum thermal conductivity At the same time material should be easy to bend in the form of helical structure, so the material selected for the helical ...

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CFD Analysis of Vortex Tube for Various Cross Sectional Nozzles

CFD Analysis of Vortex Tube for Various Cross Sectional Nozzles

... From figure 4, objection of locally momentum injection is recovered by increasing of nozzle width (nozzle area) because total nozzle area is constant for all of nozzles set. This situation caused a uniformly injection of ...

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Optimization of spiral plate heat exchanger by gradient based optimizer

Optimization of spiral plate heat exchanger by gradient based optimizer

... Abstract: Gradient based search algorithm, ‘fmincon’ is applied for thermal design optimization of the (SHE) spiral plate heat exchanger. SHE are self-cleaning by virtue of their spiral geometry, which ensures scrubbing ...

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AN EXPERIMENTAL PERFORMANCE INVESTIGATION OF COUNTER FLOW HELICAL COILED HEAT EXCHANGER

AN EXPERIMENTAL PERFORMANCE INVESTIGATION OF COUNTER FLOW HELICAL COILED HEAT EXCHANGER

... The experiment was conducted for single-phase water to water heat transfer application. This project presents a comparative analysis of different correlations given by the different researchers for helical coil ...

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Investigation on Turbulent Nanofluid Flow in Helical Tube in Tube Heat Exchangers

Investigation on Turbulent Nanofluid Flow in Helical Tube in Tube Heat Exchangers

... nanofluid flow in a helical tube in the tube heat exchanger (HTTHE) were assessed numerically through computational fluid dynamics (CFD) ...dominated flow are of more uniform temperature ...turbulent ...

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