By Vivek V. Ranade
This booklet describes how modeling fluid movement in chemical reactors may possibly provide options that enhance layout, operation, and function of reactors. Chemical reactors are any vessels, tubes, pipes, or tanks within which chemical reactions ensue. Computational movement Modeling for Chemical Reactor Engineering will express the reactor engineer how to find the categorical roles of computational circulation modeling, decide on acceptable instruments, and practice those instruments to hyperlink reactor to reactor functionality. total technique is illustrated with quite a few case reviews. has invested vast money in computational movement modeling on the way to repay provided that it may be used to gain major functionality enhancement in chemical reactors. No different unmarried resource exists which gives the knowledge contained during this booklet.
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Extra info for Computational Flow Modeling for Chemical Reactor Engineering
For single-phase flows, both the approaches give the same final form of the conservation equations (see Deen, 1998 for more discussion on different approaches to deriving conservation equations). These two approaches, however, offer different routes to simulate multiphase flow processes. Modeling multiphase flows and turbulent reactive flows based on these two approaches is discussed in Chapters 4 and 5 respectively. Basic governing equations for single-phase flow processes are discussed here. 2 .
The subject of developing suitable constitutive equations for viscoelastic fluids, is extremely complex and outside the scope of this book. As stated earlier, the focus in this book is on simulating turbulent, multiphase and reactive flows. Detailed discussion about the rheology and motion of complex fluids can be found in Tanner (1985), Bird et al. (1987) (constitutive equations, models) and Crochet et al. (1984) (numerical simulation). 3. Conservation of Energy Application of the law of conservation of energy can be used to derive transport equations for total energy.
Apart from the flow regimes, several other issues control the performance of these multiphase reactors. 8 Flow regimes of gas-liquid stirred reactor (from Middleton, 1992). - ? < °5 \e-r-l , Gas ' • T T T Turbu,en, flow ^ . Gas XT) ' Gas u Gas u Gas Some flow regimes of multiphase systems (from Krishna, 1994). transfer from gas phase to liquid phase is determined by the mass transfer coefficient, interfacial area and concentration driving force for mass transfer. Each of these aspects is intimately related to the underlying fluid dynamics.