Existence and stability results of nonlinear swelling equations with logarithmic source terms

Abstract

We considered a swelling porous-elastic system characterized by two nonlinear variable exponent damping and logarithmic source terms. Employing the Faedo-Galerkin method, we established the local existence of weak solutions under suitable assumptions on the variable exponents functions. Furthermore, we proved the global existence utilizing the well-depth method. Finally, we established several decay results by employing the multiplier method and the Logarithmic Sobolev inequality. To the best of our knowledge, this represents the first study addressing swelling systems with logarithmic source terms.

Keywords

• swelling system
• faedo-galerkin method
• well-depth method
• logarithmic sobolev inequality
• variable exponents
• general decay