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On some boundary value problems for the heat equation in a non-regular type of a prism of ℝN+1

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Published/Copyright: November 29, 2017
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Abstract

This paper is devoted to the analysis of the boundary value problem tu-Δu=f, with an N-dimensional space variable, subject to a Dirichlet–Robin type boundary condition on the lateral boundary of the domain. The problem is settled in a noncylindrical domain of the form Q={(t,x1)2:0<t<T,φ1(t)<x1<φ2(t)}×i=1N-1]0,bi[, where φ1 and φ2 are smooth functions. One of the main issues of the paper is that the domain can possibly be non-regular; for instance, the significant case when φ1(0)=φ2(0) is allowed. We prove well-posedness results for the problem in a number of different settings and under natural assumptions on the coefficients and on the geometrical properties of the domain. This work is an extension of the one-dimensional case studied in [4].

MSC 2010: 35K20; 35K50

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Received: 2015-02-12
Revised: 2015-11-13
Accepted: 2016-10-10
Published Online: 2017-11-29
Published in Print: 2018-09-01

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