Mitra, Dhrubaditya and Pandit, Rahul (2005) Dynamics of Passive-Scalar Turbulence. In: Physical Review Letters, 95 (14).
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We present the first study of the dynamic scaling or multiscaling of passive-scalar turbulence. For the Kraichnan version of passive-scalar turbulence we show analytically, in both Eulerian and quasi-Lagrangian frameworks, that simple dynamic scaling is obtained but with different dynamic exponents. By developing the multifractal model we show that dynamic multiscaling occurs in passive-scalar turbulence only if the advecting velocity field is itself multifractal. We substantiate our results by detailed numerical simulations in shell models of passive-scalar advection.
|Item Type:||Journal Article|
|Additional Information:||Copyright for this article belongs to American Physical Society.|
|Department/Centre:||Division of Physical & Mathematical Sciences > Physics|
|Date Deposited:||28 Oct 2005|
|Last Modified:||19 Sep 2010 04:20|
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