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The turbulent Prandtl number has been calculated in the two-loopapproximation of the $\eps$ expansion of the stochastic theory of turbulence.The strikingly small value obtained for the two-loop correction explains thegood agreement of the earlier one-loop result with the experiment. Thissituation is drastically different from other available nontrivial two-loopresults, which exhibit corrections of the magnitude of the one-loop term. Thereason is traced to the mutual cancellation of additional divergences appearingin two dimensions which have had a major effect on the results of previouscalculations of other quantities.Comment: 11 pages, 3 figure

Two-loop calculation of the turbulent Prandtl number