Inscrição na biblioteca: Guest
Início - ICHMT DL Ano atual Arquivos Comitê executivo Centro Internacional para Transferência de Calor e Massa

Turbulent mass transfer in a drag-reducing channel flow with dosed polymer solution by simultaneous PIV and PLIF measurements

DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal.2630
pages 2535-2546

Masaaki Motozawa
Department of Mechanical Engineering Tokyo University of Science 2641 Yamazaki, Noda-shi, Chiba-ken, Japan

T. Otsuki
Department of Mechanical Engineering, Tokyo University of Science; Department of Mechanical Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka, Japan

Takafumi Kurosawa
Department of Mechanical Engineering, Tokyo University of Science, 2641 Yamazaki, Noda 278-8510, Japan

Kaoru Iwamoto
Department of Mechanical Engineering, Tokyo University of Science, Noda-shi, Chiba 278-8510; Department of Mechanical System Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan

H. Ando
National Maritime Research Institute, 6-38-1 Shinkawa, Mitaka, Tokyo 181-0004, Japan

T. Senda
National Maritime Research Institute, Shinkawa, Mitaka-shi, Tokyo 181-0004, Japan

Yasuo Kawaguchi
Department of Mechanical Engineering, Tokyo University of Science, 2641 Yamazaki, Noda-shi, Chiba 278-8510, Japan


Turbulent mass transfer in a drag-reducing channel flow by dosed polymer solution was investigated experimentally by simultaneous PIV and PLIF measurements. To discuss the relationship between mass transfer and momentum transportation, turbulent Schmidt number was computed. Reynolds number based on the channel height was set to 40000 and poly(ethylene oxide) was used as a polymer. The polymer solution with 25 and 100 ppm of weight concentration was dosed at 10.5 L/min from the whole surface of the channel wall. As a result, in the case of water flow, dosed dyed water was ejected from the wall and was well diffused by the strong turbulent eddy motion. In contrast, when the polymer solution was dosed from the wall, the diffusion was largely suppressed in the near-wall region and drag reduction occurred. The turbulent Schmidt number largely increases over 1 in the near-wall region.

ICHMT Digital Library

Bow shocks on a jet-like solid body shape. Thermal Sciences 2004, 2004. Pulsed, supersonic fuel jets - their characteristics and potential for improved diesel engine injection. PULSED, SUPERSONIC FUEL JETS - THEIR CHARACTERISTICS AND POTENTIAL FOR IMPROVED DIESEL ENGINE INJECTION
View of engine compartment components (left). Plots of temperature distributions in centreplane, forward of engine (right). CHT-04 - Advances in Computational Heat Transfer III, 2004. Devel... DEVELOPMENT AND CURRENT STATUS OF INDUSTRIAL THERMOFLUIDS CFD ANALYSIS
Pratt & Whitney's F-135 Joint Strike Fighter Engine under test in Florida is a 3600F class jet engine. TURBINE-09, 2009. Turbine airfoil leading edge stagnation aerodynamics and heat transfe... TURBINE AIRFOIL LEADING EDGE STAGNATION AERODYNAMICS AND HEAT TRANSFER - A REVIEW
Refractive index reconstructed field. (a) Second iteration. (b) Fourth iteration. Radiative Transfer - VI, 2010. Theoretical development for refractive index reconstruction from a radiative ... THEORETICAL DEVELOPMENT FOR REFRACTIVE INDEX RECONSTRUCTION FROM A RADIATIVE TRANSFER EQUATION-BASED ALGORITHM
Two inclusion test, four collimated sources. Radiative Transfer - VI, 2010. New developments in frequency domain optical tomography. Part II. Application with a L-BFGS associated to an inexa... NEW DEVELOPMENTS IN FREQUENCY DOMAIN OPTICAL TOMOGRAPHY. PART II. APPLICATION WITH A L-BFGS ASSOCIATED TO AN INEXACT LINE SEARCH