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Effects of side ratio for ‘Y’ plan shaped tall building under wind load

Building Simulation 2021年第4期14卷 1221-1236页

作者： prasenjit sanyal Sujit Kumar Dalui Department of Civil Engineering Meghnad Saha Institute of TechnologyKolkataIndia Department of Civil Engineering IIESTShibpurHowrahIndia

Wind load and response are the major factors that govern the most critical condition for designing tall buildings. This study discusses the variability of wind load and pressure on a Y plan shaped tall building due to the change in the building side ratio. The length to width ratio is changed keeping the total plan area same. The numerical study is done by ANSYS CFX. Two turbulence models, k-epsilon and shear stress transport (SST), are used for doing the numerical simulation and the results are compared with the previous wind tunnel results in a similar flow condition. Sample points were selected based on Audze–Eglais Uniform Latin Hypercube (AELH) method and the analytical expressions of force, moment and torsional coefficients of Y plan shaped tall building are proposed. These expressions are fitted very well and the AELH method has given a great set of sample points that have significantly decreased the total computational time. The graphical representations of these expressions for various coefficients are presented and discussed. Then pressure distributions on three different models are compared and the pros and cons of higher and lower values of side ratios are discussed.

关键词： computational fluid dynamics AELH sampling method least square polynomial side ratio force coefficient moment coefficient

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Prevalence of Argulus sp. in Indian Major Carps from Bhangore Block of South 24 Parganas District, West Bengal, India

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Journal of Fisheries Science 2020年第1期2卷 5-8页

作者： Ratul Chakraborty Debapriyo Mukherjee Avishek Bardhan prasenjit Mali Koel Bhattacharya sanyal Gadadhar Dash Department of Aquatic Animal Health Faculty of Fishery SciencesWest Bengal University of Animal and Fishery Sciences(WBUAFS)5-Budherhat RoadChakgaria CampusP.O.PanchasayarKolkata-700094West BengalIndia

The study was carried out to find the prevalence and severity of Argulus *** Indian Major Carps(IMCs)collected from Bhangore block of South 24 Parganas district of West Bengal during November 2018 to August ***(2019)recorded the highest parasitic prevalence(PFI,83.33%)and the month of August(2019)recorded the lowest parasitic prevalence(PFI,9%).The identities of selected parasites were further confirmed by molecular identification through 18S rDNA *** study revealed that Argulus *** had great economic implications especially in the winter months and is one of the most prevalent problems in fresh water aquaculture systems.

关键词： Argulus Bhangore Indian major carps Parasites Prevalence Severity

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