Three-dimensional magnetic resonance velocimetry measurements of turbulence quantities in complex flow

被引：56

作者：

Elkins, Christopher J. ^{[1
]}

Alley, Marcus T. ^{[2
]}

Saetran, Lars ^{[3
]}

Eaton, John K. ^{[1
]}

机构：

[1] Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA

[2] Stanford Univ, Lucas MRI S Ctr, Dept Radiol, Stanford, CA 94305 USA

[3] Norwegian Univ Sci & Technol, Dept Energy & Proc Engn, N-7491 Trondheim, Norway

来源：

EXPERIMENTS IN FLUIDS | 2009年 / 46卷 / 02期

基金：

美国国家卫生研究院; 美国国家科学基金会;

关键词：

VELOCITY; NMR; INTENSITY; GRADIENT; FLUID;

D O I：

10.1007/s00348-008-0559-4

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A magnetic resonance velocimetry (MRV) experimental technique based on magnetic resonance imaging and capable of measuring the turbulent Reynolds stresses in a 3D flow domain is described. Results are presented in backward facing step flow in a square channel with a Reynolds number of 48,000 based on step height and freestream velocity at the step. MRV results are compared to particle image velocimetry (PIV) measurements in the centerplane containing the streamwise and cross-stream axes. MRV and PIV mean velocity measurements show excellent agreement. MRV measurements for Reynolds normal stresses compare to within +/- 20% of the PIV results while results for the turbulent shear are less accurate.

引用

页码：285 / 296

页数：12

共 20 条

[1] FLOW MEASUREMENTS BY NMR [J].

CAPRIHAN, A ;

FUKUSHIMA, E .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1990, 198 (04) :195-235

[2] THEORY OF SPIN ECHOES IN A TURBULENT FLUID [J].

DEGENNES, PG .

PHYSICS LETTERS A, 1969, A 29 (01) :20-&

[3] Quantification of intravoxel velocity standard deviation and turbulence intensity by generalizing phase-contrast MRI [J].

Dyverfeldt, Petter ;

Sigfridsson, Andreas ;

Kvitting, John-Peder Escobar ;

Ebbers, Tino .

MAGNETIC RESONANCE IN MEDICINE, 2006, 56 (04) :850-858

[4] Full-field velocity and temperature measurements using magnetic resonance imaging in turbulent complex internal flows [J].

Elkins, CJ ;

Markl, M ;

Iyengar, A ;

Wicker, R ;

Eaton, JK .

INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW, 2004, 25 (05) :702-710

[5]

Elkins CJ, 2003, EXP FLUIDS, V34, P494, DOI [10.1007/S00348-003-0587-Z, 10.1007/S00348-003-0587-z]

[6] TURBULENT-FLOW EFFECTS ON NMR IMAGING - MEASUREMENT OF TURBULENT INTENSITY [J].

GAO, JH ;

GORE, JC .

MEDICAL PHYSICS, 1991, 18 (05) :1045-1051

[7] MAPPING OF TURBULENT INTENSITY BY MAGNETIC-RESONANCE-IMAGING [J].

GATENBY, JC ;

GORE, JC .

JOURNAL OF MAGNETIC RESONANCE SERIES B, 1994, 104 (02) :119-126

[8] Echo-planar-imaging studies of turbulent flow [J].

Gatenby, JC ;

Gore, JC .

JOURNAL OF MAGNETIC RESONANCE SERIES A, 1996, 121 (02) :193-200

[9] IMPROVING MR IMAGE QUALITY IN THE PRESENCE OF MOTION BY USING REPHASING GRADIENTS [J].

HAACKE, EM ;

LENZ, GW .

AMERICAN JOURNAL OF ROENTGENOLOGY, 1987, 148 (06) :1251-1258

[10]

Han D., 2001, STUDY TURBULENT NONP

← 1 2 →