The book The Closure Problem of Turbulence Theory was written by author R H Kraichnan Here you can read free online of The Closure Problem of Turbulence Theory book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Closure Problem of Turbulence Theory a good or bad book?
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8) ^(a) = (exp(iay)) = / exp(iay)P(y)dy - 00 is the characteristic function. Upon evaluating the moments by use of the relation (5. 9) (y'') = (-i)^d^$(a)/d..^_ a^O we find (5. 10) -y = 3)^ = 10 > + C), ^ C5 + c^. 15 (y^)^ + loc^^ + ^5 ) ■=1* * %• 21 The significance of the cumulants is that they measure the degree and com- plexity of the deviation of P(y), and its moments, from a normal distribu- tion. If an expansion analogous to (5"7) is made for the characteristic functional [lO, llj of the... one-time velocity distribution, a sequence of approximations to the various moments can be formed by truncating the expansion so as to admit successively higher cumulants. In the first non- trivial approximation, we admit third-order cumulants only. Then [in correspondence to the second of relations (5. I0), with c, = 6] we find (5. 11) U^j^(x, t;x', t;x", t;x"', t) = U^^(x, t;x', t)U^(x", t;x '", t) + U^Jx, t;x", t)U^^(x', t;x"', t) + U.^(x, t;x '", t)U^^(x', t;x", t), which is the quasi -normality approximation employed by Proudman and Reid [21] and Tatsumi [27, 28].
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