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Gas Phase Distribution Effects on Heat Transfer in Upward Vertical Bubbly Channel Flows
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Two-phase (non-boiling) flows have been shown to increase heat transfer in channel flows as compared with single-phase flows. The present work explores the effects of gas phase distribution such as volume fraction and bubble size on the heat transfer in upward vertical channel flows. A two-dimensional (2D) channel flow of 10 cm wide by 100 cm high is studied numerically. Numerical simulations are performed using the commercial computational fluid dynamics (CFD) code ANSYS FLUENT. The bubble size is characterized by the Eötvös number. The volume fraction and the Eötvö number are varied parametrically to investigate their effects on Nusselt number of the two-phase flows. All simulations are compared with a single-phase flow condition.
American Society of Mechanical Engineers
Title: Gas Phase Distribution Effects on Heat Transfer in Upward Vertical Bubbly Channel Flows
Description:
Two-phase (non-boiling) flows have been shown to increase heat transfer in channel flows as compared with single-phase flows.
The present work explores the effects of gas phase distribution such as volume fraction and bubble size on the heat transfer in upward vertical channel flows.
A two-dimensional (2D) channel flow of 10 cm wide by 100 cm high is studied numerically.
Numerical simulations are performed using the commercial computational fluid dynamics (CFD) code ANSYS FLUENT.
The bubble size is characterized by the Eötvös number.
The volume fraction and the Eötvö number are varied parametrically to investigate their effects on Nusselt number of the two-phase flows.
All simulations are compared with a single-phase flow condition.
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En skvatmølle i Ljørring
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A Horizontal Mill at Ljørring, Jutland.Horizontal water-mills have been in use in Jutland since the beginning of the Christian era 2). But the one here described shows so close a c...
Effect of ocean heat flux on Titan's topography and tectonic stresses
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Numerical Evaluation of Clearance Requirements Around Obstructions in Finned Heat Sinks
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This study uses CFD to consider the effects of obstructions (bosses) on the fluid flow and heat transfer in finned heat sinks used for cooling electronic components. In particular,...
Characterization of Oil-Water Two-phase Flow Patterns in Vertical Upward Flow Pipes Based on Fractal and Chaotic Time Series Analysis
Characterization of Oil-Water Two-phase Flow Patterns in Vertical Upward Flow Pipes Based on Fractal and Chaotic Time Series Analysis
Abstract
Characterization of oil-water two-phase flow patterns in vertical upward oil-water two-phase flow having an inner diameter 18mm are elucidated based on f...
Distribution Parameter and Drift Velocity of Drift-Flux Model in Bubbly Flow
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In view of the practical importance of the drift-flux model for two-phase flow analysis in general and in the analysis of nuclear-reactor transients and accidents in particular, th...
Numerical Investigation of Heat Transfer Characteristics of a Novel Wavy-Tapered Microchannel Heat Sink
Numerical Investigation of Heat Transfer Characteristics of a Novel Wavy-Tapered Microchannel Heat Sink
In the present study, a multi-variable comparative study of the effect of microchannel heat sink configurations on their thermal performance is conducted by numerically simulating ...
Effect of Heat Source Geometry on the Transient Heat Transfer During Melting Process of a PCM
Effect of Heat Source Geometry on the Transient Heat Transfer During Melting Process of a PCM
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