23 Boundary Conditions

In order to solve the closed set of governing model equations, it is necessary to specify appropriate initial conditions and boundary conditions. For any reactor engineering problem, it will be necessary to select an appropriate solution domain, which is an important step in model formulation. The solution domain isolates the system being modeled from the surrounding environment. The influence of the environment on the flow processes of interest within the solution domain is represented by suitable formulations of boundary conditions. The solution domain, the co-ordinate system used to formulate the governing equations and the characteristics of the governing equations determine the boundary conditions requirements. Various commonly used boundary conditions are detailed here after a brief discussion on relating boundary conditions requirements with type of governing equations.

TABLE 2.3 Transport Properties (Most of the data are from Reid et al. (1987) and Perry's Handbook (1997))
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