Download e-book for kindle: Computational Fluid Dynamics Simulation of Spray Dryers: An by Meng Wai Woo

By Meng Wai Woo

ISBN-10: 1315353520

ISBN-13: 9781315353524

ISBN-10: 1498724647

ISBN-13: 9781498724647

ISBN-10: 1498724655

ISBN-13: 9781498724654

Bridging the space in realizing among the spray drying and the numerical modeler on spray drying, Computational Fluid Dynamics Simulation of Spray Dryers: An Engineer’s advisor shows find out how to numerically trap very important actual phenomena inside of a twig drying strategy utilizing the CFD process. It contains numerical suggestions to successfully describe those phenomena, that are collated from learn paintings and CFD commercial session, specifically to the dairy undefined. besides displaying easy methods to arrange versions, the ebook is helping readers establish the functions and uncertainties of the CFD approach for spray drying. After in short overlaying the fundamentals of CFD, the e-book discusses airflow modeling, atomization and particle monitoring, droplet drying, caliber modeling, agglomeration and wall deposition modeling, and simulation validation suggestions. The publication additionally solutions questions concerning universal demanding situations in commercial applications.

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Additional info for Computational Fluid Dynamics Simulation of Spray Dryers: An Engineer’s Guide

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16 ◾ Computational Fluid Dynamics Simulation of Spray Dryers temperature of the fluid. Determining suitable temperature will require the similar solution of the energy equation given below for a two-dimensional system. 11) The equation above may need to be modified for energy transfer due to water vapor transport (in the context of spray dryers) and energy generation due to turbulent viscous dissipation or due to the drying process. 2 How Is Turbulence Captured? A complete theoretical treatment on turbulent flows is beyond the scope of this book.

For the transient flow field delineated by the preliminary steady-state simulation, the next step is then to switch over to the transient simulation framework. The flow field from the initial steady-state simulation is then used as the initial solution to the transient simulations. In the transient framework, the flow field should then be allowed to numerically develop to reach a self-sustained transient behavior. Full development of the flow field can be monitored by continuous recording of the flow velocity at arbitrary locations within the chamber.

The buoyancy force is also incorporated but in a particle–air system, owing to the low density of air, this effect will be very minimal. This form of the force balance is commonly used in the spray-drying simulations for the range of particles size and airflow velocity found in spray dryers. Additional forces such as particle rotation or thermophoretic forces can be easily added into the computation if required. Particles collisions are normally neglected owing to the low particle loading in the system, unless agglomeration or coalescence modeling is adopted.

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Computational Fluid Dynamics Simulation of Spray Dryers: An Engineer’s Guide by Meng Wai Woo


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