Experimental and numerical flow analysis and design optimization of a fume hood using the CFD method

Pietrowicz, Sławomir; Kolasiński, Piotr; Pomorski, M.

doi:10.1016/j.cherd.2018.02.011

Cited by 17 publications

(13 citation statements)

References 12 publications

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“…As we can see, the presented method is able to retrieve vortex structures that were already observed through smoke visualisation by Tseng et al 1 and by Chen, 2 like the recirculation bubble behind the right-angled bench corner or vortex sheddings in the bottom edge of sash wake. The big recirculation area upward inside the chamber was also identified by Pietrowicz et al 7 The intensity and persistence in time of such flow structures give an indication about the location of potential leakages. Without necessarily causing chemicals leaks, turbulent areas and vortex structures inside the enclosure can be responsible for loss of energy efficiency.…”

Section: Turbulent Flow Analysissupporting

confidence: 56%

“…To go further in the fume hood characterisation, the next step would be to perform our method on several planes (vertical and horizontal ones) in order to have a complete 3D mapping of the flow field like in Pietrowicz et al 7 or in Li et al 22 Testing the method in the presence of a manikin standing in front the opening would also be interesting for investigating the effect of the presence of a human body on the flow. Regarding the material, the use of a low-cost camera or a smartphone camera should be investigated.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, assuming that our 3000 samples are independent, we estimated that the uncertainty of the mean horizontal velocity of the flow was 0.0037 m/s using equation (6) and using the maximum value of Figure 6 (which is ffiffiffiffi ffi u 0 2 p U out % 0:8). Idem for the uncertainty of the Reynolds stress of the x-velocity, which was 0.0011 m 2 /s 2 using equation (7) and the maximum value of Figure 6.…”

Section: Discussion About Measurement Uncertaintymentioning

confidence: 99%

“…So it cannot be considered as an on-site measurement. More recently, the two studies, Liu et al 6 and Pietrowicz et al, 7 numerically investigated the fume hood airflow with quantitative results. The results would provide an interesting comparison to an experimental database.…”

Section: Introductionmentioning

confidence: 99%

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On-site airflow measurement of a laboratory fume hood using customized large-scale image-based velocimetry

Schuster

Heitz

Georgeault

et al. 2019

Indoor and Built Environment

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This study demonstrates the feasibility of conducting on-site large-scale image-based measurements for indoor airflows characterisation. To illustrate the potential of our method, we chose to study the suction flow generated by a laboratory fume hood in operating conditions. As a matter of fact, laboratory fume hoods are frequently subject to routine checks during which air speed measurements by hot-wire anemometry are performed. However, classical point-to-point hot-wire anemometry may be not sufficient to detect and locate potential leakages. To improve these controls, we developed and tested a new method based on particle image velocimetry principles, which is non-intrusive and authorizes a good spatio-temporal analysis. To face large-scale and on-site issues, we had to make some adaptations. For this reason, we used tracers like bubbles or smoke which have good scattering properties. We also developed our own low-cost light system. To compute velocities from image sequences, we developed an optical flow algorithm based on a large-scale flow model instead of using traditional correlation. The tested method gave good results with a good agreement with sparse hot-wire anemometry measurements but with a wider spatial distribution. In addition, the method provided turbulence intensity estimation and a good monitoring of dynamic flow features, which is important for the detection of leakages.

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Section: Turbulent Flow Analysissupporting

confidence: 56%

Section: Resultsmentioning

confidence: 99%

Section: Discussion About Measurement Uncertaintymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

On-site airflow measurement of a laboratory fume hood using customized large-scale image-based velocimetry

Schuster

Heitz

Georgeault

et al. 2019

Indoor and Built Environment

View full text Add to dashboard Cite

show abstract

“…Experiments are carried out in the open field by emptying a pressurized tank in various conditions of opening the exhaust valve for different types of silencers placed at the outlet [1]. To cut the cost of the experiment, engineers and technicians use CFD calculation software to help their designing in recent years [2]- [4]. Kuan and Huang discusses the noise distribution of blower flow field.…”

Section: Introductionmentioning

confidence: 99%

Noise Prevention Research in the Hyperbaric Oxygen Chamber by Flux Vector Splitting Format

Langari

2019

IEEE Access

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This paper describes the application of computational fluid dynamics(CFD) in noise prevention of hyperbaric oxygen chambers. The flux vector splitting format and matrix transformation are used in the calculation of flow field in the hyperbaric oxygen chamber. At first, this paper simplifies the model of the hyperbaric oxygen chamber, and calculates the conservative state equation by flux vector splitting format. Being auxiliary to initial conditions, boundary conditions, meshing, time steps, and other computing elements, this paper gets the transient distribution of the parameters of each time step from flowing start to its near stop. Through displaying the data by graphic, we get the flow velocity variation, the location of the shock wave, the variational trend of pressure, and the variational trend of temperature. This paper compares the numerical and experimental results. Their similarity degree is high and this proves the feasibility to design Low-noise hyperbaric oxygen chamber by this numerical calculation method. INDEX TERMS Flux vector splitting format, hyperbaric oxygen chamber, computational fluid dynamics (CFD), noise analysis, cabin experiment.

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Pressure and flowrate distribution in central exhaust shaft with multiple randomly operating range hoods

et al. 2021

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Experimental and numerical flow analysis and design optimization of a fume hood using the CFD method

Cited by 17 publications

References 12 publications

On-site airflow measurement of a laboratory fume hood using customized large-scale image-based velocimetry

On-site airflow measurement of a laboratory fume hood using customized large-scale image-based velocimetry

Noise Prevention Research in the Hyperbaric Oxygen Chamber by Flux Vector Splitting Format

Pressure and flowrate distribution in central exhaust shaft with multiple randomly operating range hoods

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