# Cross-helicity dynamo effect in magnetohydrodynamic turbulent channel flow

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The shell-to-shell energy transfer rates for magnetohydrodynamic (MHD) turbulence are computed analytically, which shows local energy transfer rates from velocity to velocity, velocity to magnetic, magnetic to velocity, and magnetic to magnetic fields for nonhelical MHD in the inertial range. It...

- Effects of flow shear and AlfvÃ©n waves on two-dimensional magnetohydrodynamic turbulence. Douglas, Jamie; Eun-jin Kim; Thyagaraja, A. // Physics of Plasmas;May2008, Vol. 15 Issue 5, p052301
The suppression of turbulent transport by large scale mean shear flows and uniform magnetic fields is investigated in two-dimensional magnetohydrodynamic turbulence driven by a small-scale forcing with finite correlation time. By numerical integration the turbulent magnetic diffusivity DT is...

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Investigates the dissipation of small scale magnetic fields embedded in a turbulent gas flow using magnetohydrodynamic (MHD) simulations, under conditions suggested by the outer layers of the Sun, where heat is transported by turbulent convection. Development of the subgrid-scale (SGS)...

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Magnetohydrodynamic turbulent channel flows under a uniform magnetic field are studied by using a large eddy simulation technique. The effect of a uniform magnetic field is incorporated into the subgrid-scale model in the form of a local damping factor. Compared with the experiment, this model...

- Turbulent magnetohydrodynamic dynamo based on alpha and cross-helicity effects, with special... Yoshizawa, Akira; Yokoi, Nobumitsu; Kato, Hirofumi // Physics of Plasmas;Dec99, Vol. 6 Issue 12, p4586
Examines magnetohydrodynamic (MHD) state in a wide-gap spherical shell mimicking the earth's outer core. Mean-field or turbulent-dynamo theory; Induced mean magnetic field in a quasi-force-free state under a large alpha effect; Saturation level of the field; Alignment with the mean velocity...

- Local anisotropy in incompressible magnetohydrodynamic turbulence. Milano, L. J.; Matthaeus, W. H.; Dmitruk, P.; Montgomery, D. C. // Physics of Plasmas;Jun2001, Vol. 8 Issue 6, p2673
It is a well known fact that in the presence of a dc applied magnetic field, magnetohydrodynamic (MHD) turbulence develops spectral anisotropy from isotropic initial conditions. Typically, the reduced spectrum is steeper in the direction of the magnetic field than it is in any transverse...

- Apparent suppression of turbulent magnetic dynamo action by a dc magnetic field. Montgomery, David C.; Matthaeus, W. H.; Milano, L. J.; Dmitruk, P. // Physics of Plasmas;Apr2002, Vol. 9 Issue 4, p1221
Numerical studies of the effect of a dc magnetic field on dynamo action (development of magnetic fields with large spatial scales), due to helically-driven magnetohydrodynamic turbulence, are reported. The apparent effect of the dc magnetic field is to suppress the dynamo action, above a...

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Statistical properties of MHD turbulence and the mechanism of turbulent dynamo are investigated by direct numerical simulations of three-dimensional MHD equations. It is assumed that the turbulent field has a high symmetry and that the fluid has hyperviscosity and hypermagnetic diffusivity. An...

- Inverse energy cascades in three-dimensional turbulence. Hossain, Murshed // Physics of Fluids B: Plasma Physics;Mar91, Vol. 3 Issue 3, p511
Fully three-dimensional magnetohydrodynamic (MHD) turbulence at large kinetic and low magnetic Reynolds numbers is considered in the presence of a strong uniform magnetic field. It is shown by numerical simulation of a model of MHD that the energy inverse cascades to longer length scales when...