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arXiv 1204.5906math.APphysics.flu-dyn
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两种幂律流体混合物定常问题解的存在性

Existence for the steady problem of a mixture of two power-law fluids

Hermenegildo Borges de Oliveira

摘要:

本文分析了两种不同的幂律流体混合物的定常问题。从数学上讲,这个问题是两个幂律叠加的结果,一个是常数幂律指数,另一个是变量幂律指数。对于相关的边值问题,我们证明了非常弱解的存在性,提供了可变的幂律指数是有界的从上到下的常数。这一结果需要尽可能低的假设上的可变幂律指数,并作为一个特殊的情况下,从1969年Ladyzhenskaya的存在结果扩展到一个可变指数的情况下,并为所有区域的假塑性区。在一个独特的结果中,我们推广了一个经典的弱解的存在性定理的情况下,我们的问题。

英文摘要:

The steady problem resulting from a mixture of two distinct fluids of power-law type is analyzed in this work. Mathematically, the problem results from the superposition of two power laws, one for a constant power-law index with other for a variable one. For the associated boundary-value problem, we prove the existence of very weak solutions, provided the variable power-law index is bounded from above by the constant one. This result requires the lowest possible assumptions on the variable power-law index and, as a particular case, extends the existence result by Ladyzhenskaya dated from 1969 to the case of a variable exponent and for all zones of the pseudoplastic region. In a distinct result, we extend a classical theorem on the existence of weak solutions to the case of our problem.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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