PRESSURE DROP AND TURBULENCE STATISTICS IN TRANSPIRED PIPE FLOW etc15 Tracking Number 99Presentation: Session: Wall-bounded flows 4 Room: Room B Session start: 10:30 Thu 27 Aug 2015 Francisco J. S. Bandeira jarmesonbandeira@hotmail.com Affifliation: Federal University of Rio de Janeiro Juliana B. R. Loureiro jbrloureiro@mecanica.coppe.ufrj.br Affifliation: Federal University of Rio de Janeiro Atila P. Silva Freire atila@mecanica.coppe.ufrj.br Affifliation: Federal University of Rio de Janeiro Topics: - Wall bounded flows Abstract: Measurements of turbulent flow in a horizontal pipe subjected to wall transpiration are presented. Results include data on global flow rates and pressure drop, and local mean and fluctuating velocity profiles. Two distinct flow transpiration rates are studied, $v_w^{++}$ = $v_w$/$U_m$ = 0.0005 and 0.001. The effects of flow transpiration on the friction-coefficient are compared with theoretical predictions. The theory furnishes predictions accurate to 3\%. |