AMPLIFICATION OF THERMAL NOISE VIA CONVECTIVE INSTABILITY IN BINARY-FLUID MIXTURES

被引：25
|
作者：
SCHOPF, W
REHBERG, I
机构：
来源：
EUROPHYSICS LETTERS | 1992年 / 17卷 / 04期
关键词：
HYDRODYNAMIC STABILITY AND INSTABILITY; TURBULENT FLOWS; CONVECTION; AND HEAT TRANSFER; FLUCTUATION PHENOMENA; RANDOM PROCESSES; AND BROWNIAN MOTION;
D O I：
10.1209/0295-5075/17/4/007
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In the convectively unstable regime of a binary-fluid mixture in a quasi-one-dimensional ramped convection channel an erratic spatio-temporal behaviour of very small amplitudes is observed. These patterns are interpreted as the amplification of intrinsic noise. Their measured temporal correlation functions are compared with the theoretical ones obtained from a Ginzburg-Landau equation containing a noise term. The measured intensity confirms the assumption that the fluctuations are due to thermal noise.
引用
收藏
页码：321 / 326
页数：6
相关论文
共 50 条
  • [41] THERMAL CONVECTIVE INSTABILITY IN A MICROPOLAR FERROMAGNETIC FLUID SATURATED POROUS LAYER HEATED FROM BELOW
    Nanjundappa, C. E.
    Nataraj, R.
    MAGNETOHYDRODYNAMICS, 2013, 49 (3-4): : 454 - 460
  • [42] THE EFFECTS OF THERMAL NOISE IN A RAYLEIGH BENARD CELL NEAR ITS 1ST CONVECTIVE INSTABILITY
    VANBEIJEREN, H
    COHEN, EGD
    JOURNAL OF STATISTICAL PHYSICS, 1988, 53 (1-2) : 77 - 94
  • [43] Effect of Thermal Non-Equilibrium on Convective Instability in a Ferromagnetic Fluid-Saturated Porous Medium
    Jinho Lee
    I. S. Shivakumara
    M. Ravisha
    Transport in Porous Media, 2011, 86 : 103 - 124
  • [44] Effect of Thermal Non-Equilibrium on Convective Instability in a Ferromagnetic Fluid-Saturated Porous Medium
    Lee, Jinho
    Shivakumara, I. S.
    Ravisha, M.
    TRANSPORT IN POROUS MEDIA, 2011, 86 (01) : 103 - 124
  • [45] Impact of viscous dissipation, throughflow and rotation on the thermal convective instability of Jeffrey fluid in a porous medium layer
    Yadav, Dhananjay
    Awasthi, Mukesh Kumar
    Ragoju, Ravi
    Bhattacharyya, Krishnendu
    Mahajan, Amit
    Wang, Junye
    EUROPEAN JOURNAL OF MECHANICS B-FLUIDS, 2025, 109 : 55 - 65
  • [46] A simulation model for hot spring thermal energy conversion plant with working fluid of binary mixtures
    Bai, O
    Nakamura, M
    Ikegami, Y
    Uehara, H
    JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME, 2004, 126 (03): : 445 - 454
  • [47] The convective instability of Maxwell fluid-saturated porous layer using a thermal non-equilibrium model
    Malashetty, M. S.
    Kulkarni, Sridhar
    JOURNAL OF NON-NEWTONIAN FLUID MECHANICS, 2009, 162 (1-3) : 29 - 37
  • [48] Potential Amplification Mechanism of Rotor-Stator-Interaction Noise via Spiral-Poiseuille-Flow Instability
    Suzuki, Takao
    Shur, Michael L.
    Strelets, Michael Kh
    Travin, Andrey K.
    AIAA JOURNAL, 2021, 60 (04) : 2441 - 2457
  • [49] Simulation and evaluation of transient performance of ocean thermal energy conversion plant with working fluid of binary mixtures
    Bai, O
    Nakamura, M
    Ikegami, Y
    Uehara, H
    PROCEEDINGS OF THE TWELFTH (2002) INTERNATIONAL OFFSHORE AND POLAR ENGINEERING CONFERENCE, VOL 1, 2002, : 641 - 648
  • [50] The effect of a nonuniform basic temperature gradient on the convective instability of a fluid-saturated porous layer with general velocity and thermal conditions
    R. P. Thangaraj
    Acta Mechanica, 2000, 141 : 85 - 97
12345