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Conjugate heat transfer is one of the most important aspects of energy conversion and plays an important role in the thermal efficiency and fuel consumption of chambers. In the present work, a two-dimensional model for reacting flow is presented to calculate transport equations of mass, momentum, energy and species. A new solver is developed for the open-source OpenFOAM software. This new solver is able to predict the conjugate heat transfer effects of reactions and transport processes in fluid and heat conduction in solid as well as radiation in surrounding surface. The coupled method is used and the continuity of temperature and heat flux on the fluid and solid interface is applied in order to analyze conjugate heat transfer through boundary conditions. Experimental data of honeycomb burner is used to validate the new solver. Numerical results are in a good agreement with experimental data. The results show that change of fluid inlet condition and geometry dimensions affect the interaction of conjugate heat transfer and location of released heat of combustion. The location of flame is moved toward outlet as the inlet velocity is increased and toward inlet as the equilibrium ratio is increased. Increasing the length and thickness of solid reduces the preheat area as well.

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Podded drive systems are one the recent innovation in marine propulsion systems. Hydrodynamic analysis of this system is more complicated than conventional propeller-rudder systems. The different numerical methods have been used in the hydrodynamic analysis of podded drive systems. The range of these methods is from the potential method or potential/viscous approach to pure viscous methods. In this paper, we applied coupled approach in this regard. The main purpose of this research is developing a BEM/RANS coupled method for numerical simulation of podded drives. In the proposed Potential/Viscous coupled method, the flow around rotating part (propeller) is simulated by a BEM code. Then fixed parts (pod and strut) are modelled by a RANS solver. In RANS solver, the propeller can be substituted by a set of equivalent forces which called body force and added in the right hand of momentum equation. Two cycles are available for coupling the result between potential and viscous method. The coupled method is first studied and validated with a single propeller. Afterward, the propulsive performance of the podded drive systems is studied. The results include the propeller thrust coefficient, the propeller torque coefficient, and the axial force coefficient. The results obtained by coupled method are compared to and verified by the experimental data.