Modelling of Catalytic Combustion in a Deformable Porous Burner Using a Fluid-Solid Interaction (FSI) Framework

Area of Science:

• Chemical Engineering
• Combustion Science
• Computational Fluid Dynamics

Background:

• Catalytic combustion in porous media is crucial for efficient energy conversion.
• Accurate modeling of fluid-solid interactions (FSIs) is essential for understanding these processes.
• Existing models may not fully capture the complexities of gas-catalyst interfaces.

Purpose of the Study:

• To present and discuss mathematical modeling concepts for FSIs in porous burner catalytic combustion.
• To propose a novel hybrid two/three-field model for enhanced simulation accuracy.
• To provide a generalized framework for stress concepts in porous media.

Main Methods:

• Detailed analysis of physical and chemical phenomena at the gas-catalytic surface interface.
• Comparison and evaluation of different mathematical modeling approaches.
• Development and application of a hybrid two/three-field model, including interphase transfer coefficient estimation and constitutive equation discussion.

Main Results:

• A comprehensive overview of FSI modeling in catalytic combustion.
• Introduction of a generalized Terzaghi concept for stresses.
• Demonstration of the proposed model's applicability through selected examples and numerical verification.

Conclusions:

• The proposed hybrid model offers a robust framework for simulating FSIs in porous burner catalytic combustion.
• Accurate modeling requires careful consideration of interfacial phenomena, constitutive relations, and stress concepts.
• The study provides a valuable tool for optimizing catalytic combustion processes.