Search Results - subject:"Two time correlation function"

Momentum flux in Rayleigh–Bénard convection II

Shibata, Hiroshi - In: Physica A: Statistical Mechanics and its Applications 345 (2005) 3, pp. 448-456

We showed that the turbulent viscosity coefficient defined as the molecular viscosity coefficient diverges in the transition region from soft turbulence to hard turbulence in the Rayleigh–Bénard convection in the last paper (Physica A 333(2004)71). In the present paper, we measure the...

Persistent link: https://www.econbiz.de/10010588552

Heat flux in Rayleigh–Bénard convection

Shibata, Hiroshi - In: Physica A: Statistical Mechanics and its Applications 352 (2005) 2, pp. 335-346

We calculate the heat conductivity of the turbulence induced in the Rayleigh–Bénard convection. We show that the heat conductivity becomes large as we increase the temperature difference between the top and the bottom plates, i.e., the strength of the turbulence. We can easily see that the...

Persistent link: https://www.econbiz.de/10010591080

Momentum flux in Rayleigh–Benard convection

Shibata, Hiroshi - In: Physica A: Statistical Mechanics and its Applications 333 (2004) C, pp. 71-86

momentum flux is studied and its power spectrum shows the sign of the transition. The two-time correlation function does not … saturate its value in the range of the transition. Except for the transition regime the two-time correlation function for the …

Persistent link: https://www.econbiz.de/10010591215

Statistics of phase turbulence II

Shibata, Hiroshi - In: Physica A: Statistical Mechanics and its Applications 317 (2003) 3, pp. 391-400

time regimes. The local expansion rate (LER) and its two-time correlation function are calculated. The time regime where …

Persistent link: https://www.econbiz.de/10010874416

Dynamics of phase turbulence

Shibata, Hiroshi - In: Physica A: Statistical Mechanics and its Applications 310 (2002) 1, pp. 78-84

The state vector is defined for the phase turbulence described by the Kuramoto–Sivashinsky equation. Then the two-time … correlation function (TTCF) for the state vector is calculated numerically. In the case when the damping constant is zero, the …

Persistent link: https://www.econbiz.de/10010589061