Measuring Lagrangian accelerations using an instrumented particle

被引:13
作者
Zimmermann, R. [1 ]
Fiabane, L. [1 ]
Gasteuil, Y. [2 ]
Volk, R. [1 ]
Pinton, J-F [1 ]
机构
[1] Univ Lyon, CNRS, ENS Lyon, Lab Phys,UMR 5672, Lyon, France
[2] SmartINST S A S, F-69007 Lyon, France
关键词
TURBULENCE;
D O I
10.1088/0031-8949/2013/T155/014063
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Accessing and characterizing a flow imposes a number of constraints on the employed measurement techniques; in particular, optical methods require transparent fluids and windows in the vessel. Whereas one can adapt the apparatus, fluid and methods in the laboratory to these constraints, this is hardly possible for industrial mixers. In this paper, we present a novel measurement technique which is suitable for opaque or granular flows: consider an instrumented particle, which continuously transmits the force/acceleration acting on it as it is advected in a flow. Its density is adjustable for a wide range of fluids and because of its small size and its wireless data transmission, the system can be used both in industrial and in scientific mixers, allowing for a better understanding of the flow within. We demonstrate the capabilities and precision of the particle by comparing its transmitted acceleration to alternative measurements, in particular in the case of a turbulent von Karman flow. Our technique proves to be an efficient and fast tool to characterize flows.
引用
收藏
页数:7
相关论文
共 16 条
  • [1] Lagrangian temperature, velocity, and local heat flux measurement in Rayleigh-Benard convection
    Gasteuil, Y.
    Shew, W. L.
    Gibert, M.
    Chilla, F.
    Castaing, B.
    Pinton, J. -F.
    [J]. PHYSICAL REVIEW LETTERS, 2007, 99 (23)
  • [2] Gasteuil Y, 2009, THESIS ECOLE NORMALE
  • [3] Properties of steady states in turbulent axisymmetric flows
    Monchaux, R
    Ravelet, F
    Dubrulle, B
    Chiffaudel, A
    Daviaud, F
    [J]. PHYSICAL REVIEW LETTERS, 2006, 96 (12)
  • [4] Mordant N, 2001, PHYS REV LETT, V87, DOI 10.1103/PhysRevLett.87.214501
  • [5] Lagrangian acceleration measurements in convective thermal turbulence
    Ni, Rui
    Huang, Shi-Di
    Xia, Ke-Qing
    [J]. JOURNAL OF FLUID MECHANICS, 2012, 692 : 395 - 419
  • [6] Small-scale anisotropy in Lagrangian turbulence
    Ouellette, NT
    Xu, HT
    Bourgoin, M
    Bodenschatz, E
    [J]. NEW JOURNAL OF PHYSICS, 2006, 8
  • [7] Pinton J-F, 2009, Patent US, Patent No. [2011/0004344 Al, 20110004344]
  • [8] Supercritical transition to turbulence in an inertially driven von Karman closed flow
    Ravelet, Florent
    Chiffaudel, Arnaud
    Daviaud, Francois
    [J]. JOURNAL OF FLUID MECHANICS, 2008, 601 (339-364) : 339 - 364
  • [9] Lagrangian studies in convective turbulence
    Schumacher, Joerg
    [J]. PHYSICAL REVIEW E, 2009, 79 (05):
  • [10] Instrumented tracer for Lagrangian measurements in Rayleigh-Benard convection
    Shew, Woodrow L.
    Gasteuil, Yoann
    Gibert, Mathieu
    Metz, Pascal
    Pinton, Jean-Francois
    [J]. REVIEW OF SCIENTIFIC INSTRUMENTS, 2007, 78 (06)