Abstract
We establish anomalous inertial range scaling of the structure functions for a model of homogeneous, isotropic advection of a passive scalar by a random velocity field. The velocity statistics is taken as Gaussian with decorrelation in time and velocity differences scaling as in space, with . The scalar is driven by a random forcing acting on spatial scale . The structure functions for the scalar are well defined as the diffusivity is taken to zero and acquire anomalous scaling for large . The anomalous exponent is calculated explicitly for the fourth structure function and for small .
- Received 5 July 1995
DOI:https://doi.org/10.1103/PhysRevLett.75.3834
©1995 American Physical Society