Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
EXPERIMENTAL ANALYSIS OF TURBULENT SMOOTH AND ROUGH CHANNEL FLOWS
Submission Author:
Cristian Mauricio Potosi Rosero , RJ , Brazil
Co-Authors:
Cristian Mauricio Potosi Rosero, Juliana Loureiro, Atila Pantaleão Silva Freire
Presenter: Cristian Mauricio Potosi Rosero
doi://10.26678/ABCM.ENCIT2018.CIT18-0650
Abstract
Researches about turbulent flows based on the drag reduction is one of the most important topics in Fluid Mechanics. Turbulent flows in circular and rectangular geometries are very different from each other, mainly, due to the presence of secondary flows in the last one. This work pretends to confirm the occurrence of the drag reduction phenomenon in rectangular geometry with a wall of different roughness. The variation of the friction factor of a Newtonian fluid for several Reynolds numbers will be calculated using the experimental pressure drop in the channel. Non-intrusive laser optical measurement techniques, such as Particle Image Velocimetry (PIV) and Laser Doppler Anemometry (LDA) will be used to study the influence of protuberances in the velocity fields and the turbulent flow statistics for different configurations. PIV and LDA will be important to find a structural interpretation of the flow closed to the wall in the laminar sub-layer.
Keywords
Turbulent flow, Rectangular channel, Roughness, drag reduc
