Characterisation of Turbulent Duct Flows: Experiments and Direct Numerical Simulations

Description

This book presents several new findings in the field of turbulent duct flows, which are important for a range of industrial applications. It presents both high-quality experiments and cutting-edge numerical simulations, providing a level of insight and rigour rarely found in PhD theses. The scientific advancements concern the effect of the Earth’s rotation on large duct flows, the experimental confirmation of marginal turbulence in a pressure-driven square duct flow (previously only predicted in simulations), the identification of similar marginal turbulence in wall-driven flows using simulations (for the first time by any means) and, on a separate but related topic, a comprehensive experimental study on the phenomenon of drag reduction via polymer additives in turbulent duct flows. In turn, the work on drag reduction resulted in a correlation that provides a quantitative prediction of drag reduction based on a single, measurable material property of the polymer solution, regardless of the flow geometry or concentration. The first correlation of its kind, it represents an important advancement from both a scientific and practical perspective. Front Matter ....Pages i-xxxi Introduction (Bayode Owolabi)....Pages 1-6 Literature Review and Background Theory (Bayode Owolabi)....Pages 7-39 Experimental Methods (Bayode Owolabi)....Pages 41-57 Numerical Methods (Bayode Owolabi)....Pages 59-67 Turbulent Pressure-Driven Flow in a Square Duct at Low Reynolds Numbers (Bayode Owolabi)....Pages 69-82 Turbulent Wall-Driven Flows (Bayode Owolabi)....Pages 83-102 Turbulent Duct Flows with Polymer Additives (Bayode Owolabi)....Pages 103-116 Conclusions and Recommendations (Bayode Owolabi)....Pages 117-121 Back Matter ....Pages 123-141