Monchaux Romain, Cortet Pierre-Philippe, Chavanis Pierre-Henri, Chiffaudel Arnaud, Daviaud François, Diribarne Pantxo, Dubrulle Bérengère
Service de Physique de l'Etat Condensé, DSM, CEA Saclay, CNRS URA 2464, Gif-sur-Yvette, France.
Phys Rev Lett. 2008 Oct 24;101(17):174502. doi: 10.1103/PhysRevLett.101.174502. Epub 2008 Oct 23.
We experimentally characterize the fluctuations of the nonhomogeneous nonisotropic turbulence in an axisymmetric von Kármán flow. We show that these fluctuations satisfy relations, issued from the Euler equation, which are analogous to classical fluctuation-dissipation relations in statistical mechanics. We use these relations to estimate statistical temperatures of turbulence.
我们通过实验表征了轴对称冯·卡门流中不均匀非各向同性湍流的涨落。我们表明,这些涨落满足由欧拉方程导出的关系,这些关系类似于统计力学中的经典涨落 - 耗散关系。我们利用这些关系来估计湍流的统计温度。