Mass transfer measurements and flow separation behavior in a 90° short elbow

Ikarashi, Yuya; Fujisawa, Nobuyuki

doi:10.1016/j.ijheatmasstransfer.2019.03.076

Cited by 10 publications

(2 citation statements)

References 37 publications

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“…Some new measurement methods such as PIV and numerical simulation technology are also applied in recent research. In the aspect of experimental research, Ikarashia and Taguchi analyzed the influence of curvature on the flow field [12][13][14][15]. Visualization method is introduced into Fujisawa's study about the mass transfer characteristics in the elbow [16].…”

Section: Research Methods and Status Of Metrological Characteristics Of Elbow Flowmetermentioning

confidence: 99%

Analysis of metrological characteristics of elbow flowmeter under rotating state

Wang

Luo

et al. 2021

Int. J. Metrol. Qual. Eng.

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The application of elbow flowmeter in rotary equipments is beneficial to reduce the pipeline complexity. However, the intervention of centrifugal acceleration will lead to the change of metrological characteristics of elbow flowmeter. Based on the analysis of the differential pressure formation mechanism of the environmental acceleration on the elbow flowmeter, the calculation formula of the flow rate measurement with the elbow flowmeter in the rotating state is derived, and the fitting method of the discharge coefficient is put forward. The CFD method was used to analyze the internal flow field of the elbow flowmeter under rotating state, summarize the pressure distribution characteristics of the pipe wall, and verify the feasibility of the discharge coefficient fitting strategy by simulation. The results show that for the elbow flowmeters with diameters of 10 mm and 15 mm and the radius to diameter ratio of 1.5, as long as the water flow rate is between 1.5 m/s and 5 m/s, the measurement accuracy can be guaranteed to be above 4%.

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Section: Research Methods and Status Of Metrological Characteristics Of Elbow Flowmetermentioning

confidence: 99%

Analysis of metrological characteristics of elbow flowmeter under rotating state

Wang

Luo

et al. 2021

Int. J. Metrol. Qual. Eng.

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“…Optical experiments on mixing (including PLIF) in dynamic and complex geometries with strongly curved walls need further investigation. The challenge in this work is how to fulfill the refractive index matching (RIM) of both working fluids and working fluids with the transparent solid material of the mixer to allow for unobstructed optical access. , PLIF images can not only display the mixing effectiveness of highly viscous fluids in the dynamic mixer at specific conditions but also validate simulations. Through this technique, the understanding of mixing quality has moved from an empirical one, relying on a single parameter, to a multidimensional one, incorporating a number of factors …”

Section: Introductionmentioning

confidence: 99%

Flow Pattern and Mixing Characteristics of Highly Viscous Fluids in a Dynamic Mixer

Wang,

Li,

Gao

et al. 2024

Ind. Eng. Chem. Res.

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Computational fluid dynamics (CFD) was used to assess the flow patterns and mixing characteristics of highly viscous fluids in a dynamic mixer. The simulated concentration distribution was validated by the data measured using planar laser-induced fluorescence (PLIF). The refractive indices of the two fluids and the transparent solid material comprising the mixer were matched to minimize the bending of sent and received light. The simulated concentration fields agreed well with the measured concentration fields. The flow pattern and mixing performance were quantitatively evaluated by using the mixing index λ and the coefficient of variation (COV), respectively. After the mixing performance reached time independence, a reduction of the COV at the outlet was associated with a slight increase of the volume-averaged |λ|. The results suggested that elongational flow was more effective than shear flow in obtaining a more uniform concentration distribution in highly viscous fluids.

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A Study on the Optimization of Joint Mandrel Shape for Manufacturing Long Type Elbow Using Push Bending Process

Yang

Lee

2020

Int. J. Precis. Eng. Manuf.

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Mass transfer measurements and flow separation behavior in a 90° short elbow

Cited by 10 publications

References 37 publications

Analysis of metrological characteristics of elbow flowmeter under rotating state

Analysis of metrological characteristics of elbow flowmeter under rotating state

Flow Pattern and Mixing Characteristics of Highly Viscous Fluids in a Dynamic Mixer

A Study on the Optimization of Joint Mandrel Shape for Manufacturing Long Type Elbow Using Push Bending Process

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