|Table of Contents|

Investigation on Roof Wind-induced Snow Distribution of Low-rise Double-tooth Greenhouses(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2022年05期
Page:
94-103
Research Field:
结构工程
Publishing date:

Info

Title:
Investigation on Roof Wind-induced Snow Distribution of Low-rise Double-tooth Greenhouses
Author(s):
NIE Shao-feng1;  HUANG Xin2;  WANG Shuo1;  HUANG Cheng-jie3
(1. School of Civil Engineering, Chang'an University, Xi'an 710061, Shaanxi, China; 2. A+E Design Co., Ltd., Shenzhen 518031, Guangdong, China; 3. Sinic Holdings(Group)Company Limited, Nanchang 310013, Jiangxi, China)
Keywords:
low-rise building;  double-tooth greenhouse;  multiphase flow model;  numerical analysis;  wind-reduced snow distribution
PACS:
TU375
DOI:
10.19815/j.jace.2021.04063
Abstract:
In order to study the wind-induced snow cover on the roof of low-rise double-tooth greenhouse, based on the Fluent, the Mixture multiphase flow model was selected, the wind and snow two-phase flow models were established. To verify the accuracy of the wind and snow two-phase flow field and choose the reasonable turbulence model, the k-w, SST k-w and k-kl-w turbulence models were used to simulate the snow distribution around the cube. Then, the numerical results were compared with the test results to verify the correctness of the numerical models. The influences of wind speed, the wind direction, the roof slope ratio, and the length-span ratio on the distribution of wind-reduced snow cover on the roof of low-rise double-tooth greenhouses were studied in detail. The results show that the distribution of wind-reduced snow cover on the roof of the low-rise double-toothed greenhouse can well reflected through the wind and snow two-phase flow model and two-phase flow field established using k-kl-w turbulence model; the snow thickness on the roof of the greenhouse decreases with the increase of the wind speed and the roof slope ratio, however, the influence degree of roof slope ratio is smaller than that of wind speed and wind direction; the snow erosion and accumulation position on the roof of the greenhouse changes with the wind direction; the length-span ratio of the greenhouse structure has little effect on the distribution of snow on the roof. The snow distribution coefficient of the low-rise three-tooth greenhouse roof and the low-rise four-tooth greenhouse roof can refer to the low-rise double-tooth greenhouse roof; the proposed uneven distribution coefficients of snow on the roof of low-rise double-tooth greenhouses can provide a reference for winter snow disaster prevention design of the low-rise double-tooth greenhouses roof.

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Last Update: 2022-09-30