By Vivek V. Ranade
This booklet describes how modeling fluid stream in chemical reactors may perhaps supply options that increase layout, operation, and function of reactors. Chemical reactors are any vessels, tubes, pipes, or tanks within which chemical reactions occur. Computational move Modeling for Chemical Reactor Engineering will exhibit the reactor engineer how to find the explicit roles of computational circulate modeling, decide upon acceptable instruments, and practice those instruments to hyperlink reactor to reactor functionality. total method is illustrated with various case experiences. has invested mammoth money in computational circulate modeling so as to repay provided that it may be used to achieve major functionality enhancement in chemical reactors. No different unmarried resource exists which supplies the data contained during this ebook.
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Extra info for Computational Flow Modeling for Chemical Reactor Engineering
Detailed knowledge of complex multiphase fluid dynamics and mixing occurring in such complex equipment allows the correct selection of nozzle design and nozzle locations. Recent optimization efforts (Sinclair, 1995) based on rigorous experiments and modeling of multiphase fluid dynamics resulted in a substantial increase (by 50 to 100%) in the capacity of these polyolefin reactors (this means producing 50000-100000 tons per year of polyethylene more from the existing reactor)! Several such examples may be cited from the current process industry.
1, such simplifications have been extensively used to analyze the behavior of reactors. In order to further enhance our abilities to understand and control the flow processes occurring in reactors, it is necessary to provide a more rigorous treatment of momentum conservation and to consider mass, momentum and energy conservation equations simultaneously. Any rigorous analysis of flow processes starts with the application of the universal laws of conservation of mass, momentum and energy. It may be of interest to point out that the conservation laws of momentum and energy may be derived from the homogeneity of space and time (Bird, 1998).
The fourth and fifth terms represent reversible and irreversible change in the enthalpy due to pressure and viscous dissipation, respectively. The sixth term accounts for changes in enthalpy due to diffusive mass fluxes and the final term is the volumetric source of enthalpy (due to say, chemical reactions). 10) where k is thermal conductivity of the fluid. The energy conservation equation is intimately linked to momentum conservation equations via the fourth and fifth terms. For most reacting systems, the contribution of energy released or absorbed by chemical reactions usually dominates the other terms originating from pressure and viscous effects.