Wind tunnel model tests of snow drifting on a two-level flat roof

Isyumov, N.; Mikitiuk, M.

doi:10.1016/0167-6105(90)90086-r

Cited by 59 publications

(10 citation statements)

References 4 publications

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“…Since the beginning of snowdrift research,, many different similarity criteria have been proposed, validated, and applied by some famous scholars, such as Strom [32], Odar [33], Calkins [34], Kind [19], Iversen [16], Anno [35], Isyumov [18], Naaim [36], Delpech [21], Beyers [2], and so on.…”

Section: Test Similarity Criteria Based On Snowfall Modementioning

confidence: 99%

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Modeling of the Snowdrift in Cold Regions: Introduction and Evaluation of a New Approach

et al. 2019

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Unbalanced, or non-uniform, snow loads caused by snow drifting or sliding in cold regions with heavy snowfalls, can be a serious problem for the building industry. However, the methods for predicting snow distribution still need to be improved. Field observation is the most direct and reliable method to study snow distribution, but because the natural environment is uncontrollable and varies dramatically, sometimes conclusions may be confused under the influence of the many variables in the investigation. This paper proposes a snowing experiment approach using an outdoor snow–wind combined experiment facility for the study of snow distribution. The facility can produce a stable and controllable wind field and snowfall environment. Experiments which focused on snowdrift around a building were conducted during the winter to make an evaluation of the repeatability and reliability of the new approach. Finally, from the analysis of results, it was demonstrated that the experimental facility was stable and that the similarity criterion adopted for the snowing pattern was reliable. Especially, the minimum value of the friction speed ratio was suggested to ensure the test accuracy.

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Section: Test Similarity Criteria Based On Snowfall Modementioning

confidence: 99%

“…Wind tunnel testing [16][17][18] is the most effective method for investigating snow distribution under the action of airflow. Kind [19,20] identified the important similarity criteria by analyzing the saltation process and discussed the necessary compromises in the modeling procedures.…”

Section: Introductionmentioning

confidence: 99%

Modeling of the Snowdrift in Cold Regions: Introduction and Evaluation of a New Approach

et al. 2019

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“…Wind tunnel test model can be established according to the above rules, such as studied by Isymouv [9], Sant' Anna [10], O'rourke [11]. Kind [5] suggested that the Reynolds number should be taken into account and introduced the Reynolds number of roughness-height, i.e.…”

Section: Reynolds Numbermentioning

confidence: 99%

Similarity Study on Snowdrift Wind Tunnel Test

Liao¹,

Li²,

Huang³

2013

OJCE

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The model for snowdrift wind tunnel test needs to be similar with the prototype. Based on detailed analysis in aspects of geometry, kinematics and dynamics, the major similarity parameters that need to be satisfied are gained. The contradiction between the Reynolds number and Froude number as well as the problem of time scale is introduced, and the selections of the model parameters are specified. Lastly, an example of snowdrift wind tunnel test by adoption of quartz sand as the model of snow grains is presented. The flow field and the snow distributions on a typical stepped roof were investigated. The results show that the flow filed characters are in good agreement with the field observations, and the stepped roof snow depth distributions are basically consistent with the observation results.

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“…Many experiments have been carried out on snow loads on building roofs over recent years using wind or water tunnels. These methods have been recognized as reliable tools for practical design for snow loads on building roofs (Isyumov and Mikitiuk, 1990; O’Rourke and Wrenn, 1997; Sant’Anna and Taylor, 1990; Zhou et al, 2016). Especially, experiments carried out in climatic wind tunnels with specific model and weather conditions, in which real or artificial snow particles are used and various parameters of snowfall can be controlled, have made great contributions in the process of exploring the knowledge (Delpech et al, 1998; Dufresne de Virel et al, 2000; Mitsuhashi, 2003).…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of unbalanced snow loads on isolated gable-roof with or without scuttle

Liu

Zhang

Fan

et al. 2020

Advances in Structural Engineering

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Unbalanced snow loads on roofs have been a turbulent and significant problem for the building industry. Gables are one of the most common roof shapes, which are widely adopted as the roof shape for family residences, factories, ware houses, and garages. Series of experiments on an isolated gable-roof with or without scuttles and different roof pitches were done for the purpose of exploring the unbalanced patterns of snow loads. The model buildings made of wood have the same floor space, 2000 × 2000 mm but different roof pitches. A new open air snow–wind combined experimental facility was adopted in the experiments. The facility, which is like an open air wind tunnel with a snowfall simulator, can produce a stable wind field and snowfall environment for a specific duration. Artificial snow was used in the experiments, and particles properties were compared with natural snow previously proposed by the other authors. The experiment results indicated that the unbalanced snow loads were strongly connected with various wind velocities and roof pitches and a scuttle or other salient on the roof would bring an evident influence of patterns of snow distribution on the roofs.

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Wind tunnel model tests of snow drifting on a two-level flat roof

Cited by 59 publications

References 4 publications

Modeling of the Snowdrift in Cold Regions: Introduction and Evaluation of a New Approach

Modeling of the Snowdrift in Cold Regions: Introduction and Evaluation of a New Approach

Similarity Study on Snowdrift Wind Tunnel Test

Experimental investigation of unbalanced snow loads on isolated gable-roof with or without scuttle

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