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Articles 1 - 4 of 4
Full-Text Articles in Engineering
Wake Dynamics And Passive Flow Control Of A Blunt Trailing Edge Profiled Body, Lakshmana Sampat Doddipatla
Wake Dynamics And Passive Flow Control Of A Blunt Trailing Edge Profiled Body, Lakshmana Sampat Doddipatla
Electronic Thesis and Dissertation Repository
Wake flows behind two-dimensional bodies are dominated mainly by two types of coherent structures, namely, the Karman Benard vortices and the streamwise vortices, also referred to as rolls and ribs respectively. The three-dimensional wake instabilities lead to distinct instability modes (mode-A, mode-B and mode-C or mode S) depending on the flow Reynolds number and geometric shape. The present investigation explores the mechanism by which the flow transitions take place to three-dimensionality in the near wake of a profiled leading edge and blunt trailing edge body. Experiments consisting of a combination of Planar Laser Induced Fluorescence visualizations and Particle Image Velocimetry …
Numerical Assessment Of Roof Panel Uplift Capacity Under Wind Load, Weixian He
Numerical Assessment Of Roof Panel Uplift Capacity Under Wind Load, Weixian He
Electronic Thesis and Dissertation Repository
ABSTRACT
The integrity of the roof system is essential for ensuring the safety of inhabitants and preventing excessive damage to light-frame wood structures. The uplift capacity of fastened roof panels has been investigated using experimental tests and numerical models, where monotonic uniform static pressures are often applied to the roof panel models. The verification is needed for the adequacy of using static uniformly distributed pressure representing the wind load. Moreover, the uncertainty of nail withdrawal behaviour has not been included in existing numerical models, and the effect due to construction errors has not been addressed rationally.
A nonlinear Finite Element …
Response Of A Two-Story Residential House Under Realistic Fluctuating Wind Loads, Murray J. Morrison
Response Of A Two-Story Residential House Under Realistic Fluctuating Wind Loads, Murray J. Morrison
Electronic Thesis and Dissertation Repository
Severe wind storms such as tropical cyclones, tornados, downbursts etc. can cause significant damage to infrastructure. Damage surveys following these events have shown that the roofs of residential, wood-frame construction are particularly vulnerable to failures. While damage surveys provide detail information of what components fail, they cannot provide the loads at which these failures occurred or how they initiated. Wind tunnel pressure models provide detailed information of the wind loads on buildings, however, they are not able to predict failures or how these loads are transferred through the structure. In order to better understand the response of wood framed houses …
The Effect Of Particle Size On Hydrolysis And Modeling Of Anaerobic Digestion, Saad Aldin
The Effect Of Particle Size On Hydrolysis And Modeling Of Anaerobic Digestion, Saad Aldin
Electronic Thesis and Dissertation Repository
Batch experiments were performed to investigate the effect of particulate protein particle size on the hydrolysis of casein in anaerobic degradation. While particle size did not affect the ultimate protein degradation efficiency, the hydrolysis rate coefficient increased from 0.034 to 0.298 d-1 with the change in specific surface area from 0.01 to 0.192 m2/g. The maximum methane production rate was affected by the particle size change, although the ultimate amount of methane produced was approximately the same despite the change in specific surface area. A mathematical relationship between the hydrolysis rate coefficient and specific surface area was developed and a …