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Exact solutions for a forced Burgers equation with a linear external force

机译:具有线性外力的强迫Burgers方程的精确解

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investigate the solutions of the Burgers equation partial derivative(t)u (x, t) = D partial derivative(2)(x)u(x, t) - partial derivative(x)[F(x, t) u(x, t)] - kappa u(x, t)partial derivative(x)u(x, t) + Phi(x, t), where F(x, t) is an external force and Phi(x, t) represents a forcing term. This equation is first analyzed in the absence of the forcing term by taking T(x, t) = k(1)(t) - k(2)(t)x into account. For this case, the solution obtained extends the usual one present in the Omstein-Uhlenbeck process and depending on the choice of k(1)(t) and k(2)(t) can present a stationary state or an anomalous spreading. Afterwards, the forcing terms Phi(x, t) = Phi(1)(t) + Phi(2)(t)x and Phi(x, t) = Phi(3)x - Phi(4)/x(3) are incorporated in the previous analysis and exact solutions are obtained for both cases. (C) 2008 Elsevier B.V. All rights reserved.
机译:研究Burgers方程的解偏导数(t)u(x,t)= D偏导数(2)(x)u(x,t)-偏导数(x)[F(x,t)u(x ,t)]-kappa u(x,t)偏导数(x)u(x,t)+ Phi(x,t),其中F(x,t)是外力,而Phi(x,t)表示强制术语。首先,在不存在强迫项的情况下,通过考虑T(x,t)= k(1)(t)-k(2)(t)x来分析该方程。对于这种情况,获得的解扩展了Omstein-Uhlenbeck过程中存在的通常解,并且取决于k(1)(t)和k(2)(t)的选择,可以呈现出稳态或反常扩展。之后,强制项Phi(x,t)= Phi(1)(t)+ Phi(2)(t)x和Phi(x,t)= Phi(3)x-Phi(4)/ x(3 )已纳入先前的分析中,并针对这两种情况获得了精确的解决方案。 (C)2008 Elsevier B.V.保留所有权利。

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