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On a degenerate parabolic equation with Newtonian fluid∼non-Newtonian fluid mixed type
Journal of Inequalities and Applications ( IF 1.5 ) Pub Date : 2021-01-28 , DOI: 10.1186/s13660-021-02550-w
Sujun Weng

We study the existence of weak solutions to a Newtonian fluid∼non-Newtonian fluid mixed-type equation $$ {u_{t}}= \operatorname{div} \bigl(b(x,t){ \bigl\vert {\nabla A(u)} \bigr\vert ^{p(x) - 2}}\nabla A(u)+\alpha (x,t)\nabla A(u) \bigr)+f(u,x,t). $$ We assume that $A'(s)=a(s)\geq 0$ , $A(s)$ is a strictly increasing function, $A(0)=0$ , $b(x,t)\geq 0$ , and $\alpha (x,t)\geq 0$ . If $$ b(x,t)=\alpha (x,t)=0,\quad (x,t)\in \partial \Omega \times [0,T], $$ then we prove the stability of weak solutions without the boundary value condition.

中文翻译:

关于牛顿流体非牛顿流体混合型的退化抛物方程

我们研究了牛顿流体-非牛顿流体混合型方程$$(u_ {t}} = \ operatorname {div} \ bigl(b(x,t){\ bigl \ vert {\ nabla A(u)} \ bigr \ vert ^ {p(x)-2}} \ nabla A(u)+ \ alpha(x,t)\ nabla A(u)\ bigr)+ f(u,x, t)。$$我们假设$ A'(s)= a(s)\ geq 0 $,$ A(s)$是严格增加的函数,$ A(0)= 0 $,$ b(x,t)\ geq 0 $和$ \ alpha(x,t)\ geq 0 $。如果$$ b(x,t)= \ alpha(x,t)= 0,\ quad(x,t)\在\ partial \ Omega \ times [0,T]中,则$$证明了弱的稳定性没有边界值条件的解。
更新日期:2021-01-28
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