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INVESTIGACI ON REVISTA MEXICANA DE FISICA 52 (5) 444452 OCTUBRE 2006 Reduction of friction in fluid transport: experimental investigation

Reduction of friction in fluid transport: experimental investigation
G.Aguilar*, K. Gasljevic, and E.F. Matthys
Department of Mechanical and Environmental Engineering, University of California Santa Barbara,
Santa Barbara CA, 93106, U.S.A.
Recibido el 8 de septiembre de 2006; aceptado el 22 de septiembre de 2006
Drag reduction (DR) by the use of polymer and surfactant solutions is by far the most effective drag-reducing technique for turbulent flows (up
to 8-fold reduction in friction coefficients is possible on straight pipes). From a fundamental point of view, the study of the DR phenomenon
offers an opportunity for a better understanding of turbulence in general; from a practical point of view, DR can be used to save pumping
power. Commercial implementation of drag-reducing fluids has proved successful for oil pipeline transportation, and looks promising for
many other applications that are still under investigation, e.g. district heating or cooling systems, hydronic systems in buildings, sewers,
irrigation, industrial processes, etc. Our efforts have focused on two main areas: (A) experimental research on momentum and heat transfer
of turbulent flows of drag-reducing solutions, and (B) implementation of these solutions in hydronic cooling systems in buildings for energy
conservation purposes. This paper describes an overview of the typical experimental research that we conduct in our non-Newtonian fluid
mechanics, rheology, and heat transfer laboratory at UCSB.
Keywords: Drag reduction; heat transfer reduction; polymer; surfactant.
La reducci´on de fricci´on o de arrastre (DR) mediante el uso de soluciones polim´ericas o surfactantes es sin duda alguna la t´ecnica de reducci´on
de fricci´on para flujos turbulentos en tuber´ias m´as efectiva (es posible obtener reducciones de hasta un factor de 8 en los coeficientes de
fricci´on en segmentos de tuber´ias rectas). Desde el punto de vista fundamental, el estudio del fen´omeno de DR ofrece la oportunidad de
comprender mejor flujos turbulentos; desde el punto de vista pr´actico, la DR puede ser usada con prop´ositos de ahorro en potencia de bombeo.


Source: Aguilar, Guillermo - Department of Mechanical Engineering, University of California at Riverside


Collections: Engineering