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Book Computational Transport Phenomena of Fluid Particle Systems

Download or read book Computational Transport Phenomena of Fluid Particle Systems written by Hamid Arastoopour and published by Springer. This book was released on 2016-12-25 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book concerns the most up-to-date advances in computational transport phenomena (CTP), an emerging tool for the design of gas-solid processes such as fluidized bed systems. The authors examine recent work in kinetic theory and CTP and illustrate gas-solid processes’ many applications in the energy, chemical, pharmaceutical, and food industries. They also discuss the kinetic theory approach in developing constitutive equations for gas-solid flow systems and how it has advanced over the last decade as well as the possibility of obtaining innovative designs for multiphase reactors, such as those needed to capture CO2 from flue gases. Suitable as a concise reference and a textbook supplement for graduate courses, Computational Transport Phenomena of Gas-Solid Systems is ideal for practitioners in industries involved with the design and operation of processes based on fluid/particle mixtures, such as the energy, chemicals, pharmaceuticals, and food processing.

Book Computational Fluid Dynamics in Drinking Water Treatment

Download or read book Computational Fluid Dynamics in Drinking Water Treatment written by Bas Wols and published by IWA Publishing. This book was released on 2011-10-20 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: Special Offer: KWR Drinking Water Treatment Set - Buy all five books together and save £119! Computational Fluid Dynamics (CFD) uses advanced numerical models to predict flow, mixing and (bio)-chemical reactions. In drinking water engineering, CFD is increasingly applied to predict the performance of treatment installations and to optimise these installations. A lack of understanding of the hydraulics in drinking water treatment systems has resulted in suboptimal design of installations. The formation of unwanted disinfection-by-products and the energy consumption or use of chemicals is therefore higher than necessary. The aim of this work is to better understand the hydraulic and (bio)-chemical processes in drinking water treatment installations using experimental and numerical techniques. By combining these techniques, CFD modelling is further developed as a tool to evaluate the performance of these installations. This leads to new insights in the applicability of models in ozone and UV systems, and new insights in design concepts of these systems. CFD modelling proves to be a powerful tool to understand the hydrodynamic and (bio)-chemical processes in drinking water systems. If applied properly, accounting for the complex turbulent motions and validated by experiments, this tool leads to a better design of UV reactors, ozone systems and other systems dictated by hydraulics.

Book CFD Modelling for Wastewater Treatment Processes

Download or read book CFD Modelling for Wastewater Treatment Processes written by Julien Laurent and published by IWA Publishing. This book was released on 2022-06-15 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Scientific and Technical Report (STR) provides in-depth fundamentals and guidelines regarding Computational Fluid Dynamics (CFD) simulations of Water Resources Recovery Facilities (WRRFs) unit processes (e.g. headworks, aerobic and anaerobic biological reactors, settling tanks, disinfection). Each unit process is described with respect to: Literature review and process description Relevant CFD concepts and modelling approach Case studies Future research needs CFD Modelling for Wastewater Treatment Processes also opens the discussion on two fundamental topics: experimental validation of CFD simulations, and the complementarity between CFD and Chemical Reaction Engineering approaches. This book is intended for undergraduate and graduate students majoring in fields related to wastewater treatment and/or fluid mechanics, as well as researchers and engineers who conduct research and practices in modelling such unit processes. Water resource recovery modelling is not just about lab-scale processes. Now and in the future, it is about improving our understanding of (and designing better) full-scale facilities!

Book Coupling Population Balances to Computational Fluid Dynamics Solvers

Download or read book Coupling Population Balances to Computational Fluid Dynamics Solvers written by Laurence Robert McGlashan and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Numerical Simulation of Effluent Discharges

Download or read book Numerical Simulation of Effluent Discharges written by Abdolmajid Mohammadian and published by CRC Press. This book was released on 2023-01-26 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerical Simulation of Effluent Discharges: Applications with OpenFOAM provides a resource for understanding the effluent discharge mechanisms and the approaches for modeling them. It bridges the gap between academia and industry with a focused approach in CFD modeling and providing practical examples and applications. With a detailed discussion on performing numerical modeling of effluent discharges in various ambient waters and with different discharge configurations, the book covers the application of OpenFOAM in effluent discharge modeling. Features: Discusses effluent discharges into various ambient waters with different discharge configurations. Focuses on numerical modeling of effluent discharges. Covers the fundamentals in predicting the mixing characteristics of effluents resulting from desalination plants. Reviews the past CFD studies on the effluent discharge modeling thoroughly. Provides guidance to researchers and engineers on the future steps in modeling of effluent discharges. Includes an introduction to OpenFOAM and its application in effluent discharge modeling. The book will benefit both academics and professional engineers practicing in the area of environmental fluid mechanics and working on the effluent discharge modeling. Chapter 3 of this book is available for free in PDF format as Open Access from the individual product page at www.routledge.com. It has been made available under a Creative Commons Attribution-Non Commercial-No Derivatives 4.0 license.

Book Computational Modelling for Direct Air Capture of CO2

Download or read book Computational Modelling for Direct Air Capture of CO2 written by Mit Patel and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atmospheric concentration of CO2 has been increasing at an accelerated pace for past few decades and is shown to have strong correlation with climate change. Push towards renewable energy will not address CO2 already in the atmosphere necessitating so-called carbon negative technologies. Adsorption based direct air capture is a field gaining interest as a negative carbon technology. Adsorption based DAC are attractive towards this end; however, much work remains to identify the appropriate sorbent to selectively remove vanishingly low concentrations of CO2 from the atmosphere. Hence, this problem is ideally suited for computational simulations to determine optimal sorbent. Available open-source chemical process simulators lack the ability to readily simulate the adsorption based direct air capture process train. Commercially available software exist to solve similar problems, but they are prohibitively expensive and often not flexible enough to model novel physisorbent solids. In this work, we propose an open-source computational framework for simulation of direct air capture process using open-source libraries and software such as pyGAPS, FEniCS and DWSIM. We also implement foundational theoretical and computational methods for further integration between those software.

Book Stochastic Water Demand Modelling

Download or read book Stochastic Water Demand Modelling written by Mirjam Blokker and published by IWA Publishing. This book was released on 2011-09-19 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water quality processes in the drinking water distribution network are strongly influenced by the flow velocity and residence time of the water in the network. In order to understand how the water quality changes in the drinking water distribution network, a good understanding of hydraulics is required. Specifically in the periphery of the network, where customers are connected, the hydraulics can change rapidly. During the night time the water is almost stagnant and the residence time increases. In the morning, when everybody gets up and flushes the toilet and takes a shower, high flow velocities can occur. During the remainder of the day flow velocities are low. The stochastic endues model SIMDEUM was developed to simulate water use on a small time scale (1 s) and small spatial scale (per fixture). SIMDEUM enables a good model of flow velocities, residence times and the connected water quality processes in the water distribution network. Stochastic Water Demand Modelling: Hydraulics in Water Distribution Networks describes the requirements of hydraulics in water quality modelling and provides insight into the development of detailed residential and non-residential water demand models. The book illustrates the use of detailed demand models in water quality models with respect to the variation in residence times and the relation with particle accumulation and resuspension. The models are compared to measurements in several real drinking water distribution networks.

Book Development of Computational Fluid Dynamics Based Artificial Neural Network Metamodels for Wastewater Disinfection

Download or read book Development of Computational Fluid Dynamics Based Artificial Neural Network Metamodels for Wastewater Disinfection written by Wangshu Wei and published by . This book was released on 2018 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: The mechanisms of the mixing of two streams are investigated numerically. The transport processes of both mass and heat transfer in the mixing of either two gases or two miscible liquids are studied with 3-D time-dependent computational fluid dynamics (CFD) simulations. The flow fields are calculated for the T-junction (of two circular cross-section pipes that meet orthogonally at a junction) which is one of the most common mixing devices in the study of mass and heat transfer. For turbulent flow regimes, the large eddy simulation (LES) technique is employed. Second-order differencing scheme is applied in the simulation to minimize numerical diffusion. The results obtained by the numerical simulations are verified with available experimental data in the literature for air-methane mixing in a T-junction. In the wastewater disinfection process, Peracetic acid (PAA) is an effective anti-microbial agent for disinfection and has a significant applicability in wastewater treatment processes. Similar to other chemical disinfection technologies, such as chlorination, and ozonation, the performance of PAA is determined by hydraulics of a disinfection contactor, chemical kinetics of microbial inactivation, and specific water characteristics. On-site physical modelling on pilot scale has been an important and usual method to validate the kinetics and the performance for a particular system. However, physical modelling is expensive and time consuming. CFD technique offers an alternative to physical modelling. With increasing computational power on personal computers (PCs), applying CFD simulation on a full-scale reactor is becoming more and more achievable. With proven accuracy on predicting the performance of full scale facilities, CFD is now playing a significant role in the wastewater treatment industry. A transient CFD simulation of a full-scale contactor with reasonable accuracy can be achieved within hours on PCs, which significantly lower the cost of undertaking physical modelling experiments. Metamodels based on artificial neural network (ANN) are computationally efficient mathematical approximations to a highly complex system with multiple non-linear features. With a parametric study of CFD simulations providing training dataset, the metamodel is able to be calibrated to predict the performance of a variety contactors with different geometries, inlet conditions and chemical kinetics. In this thesis, the results of microorganism inactivation and PAA decay in full scale contactors using three-dimensional CFD models are presented. Then the results of the simulations were applied to develop ANN-based metamodels. The performance of metamodels were validated with both CFD simulations and pilot scale experiments.

Book Integrating Computational Fluid Dynamics and Biological Model to Assess Wastewater Reactor Design

Download or read book Integrating Computational Fluid Dynamics and Biological Model to Assess Wastewater Reactor Design written by Albert Vilà-Rovira and published by . This book was released on 2017 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: This doctoral thesis has integrated biological models (activated sludge models "ASM") with simulation tools of computational fluid dynamics "CFD", and has applied them to the design of two advanced technologies for wastewater treatment: "Microbial Fuel Cells" and the "Anammox" process. Wastewater treatments based on Microbial Fuel Cells use the catalytic bioelectrochemical activity of certain microorganisms to oxidise organic compounds and produce electricity without needing additional chemical compounds. In Anammox process (Anaerobic Ammonium Oxidation) microorganisms also play a main role in the autotrophic removal of nitrogen compounds.

Book Physical Modelling Study of Sleipner West CO2 Sequestration Stage 1 Modelling the Sleipner West Overburden

Download or read book Physical Modelling Study of Sleipner West CO2 Sequestration Stage 1 Modelling the Sleipner West Overburden written by Brian J. Evans and published by . This book was released on 2002 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: The project was established as the first stage of a two stage process to simulate the sequestration of CO2. The overall project was to build a scaled physical model of the Sleipner West (North Sea) CO2 sequestration site, so the results of CO2 sequestration could be simulated, which would allow emprical data to be collected and used in further studies.

Book Computational Modeling of Mixed Solids for CO2 CaptureSorbents

Download or read book Computational Modeling of Mixed Solids for CO2 CaptureSorbents written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Since current technologies for capturing CO2 to fight global climate change are still too energy intensive, there is a critical need for development of new materials that can capture CO2 reversibly with acceptable energy costs. Accordingly, solid sorbents have been proposed to be used for CO2 capture applications through a reversible chemical transformation. By combining thermodynamic database mining with first principles density functional theory and phonon lattice dynamics calculations, a theoretical screening methodology to identify the most promising CO2 sorbent candidates from the vast array of possible solid materials has been proposed and validated. The calculated thermodynamic properties of different classes of solid materials versus temperature and pressure changes were further used to evaluate the equilibrium properties for the CO2 adsorption/desorption cycles. According to the requirements imposed by the pre- and post- combustion technologies and based on our calculated thermodynamic properties for the CO2 capture reactions by the solids of interest, we were able to screen only those solid materials for which lower capture energy costs are expected at the desired pressure and temperature conditions. Only those selected CO2 sorbent candidates were further considered for experimental validations. The ab initio thermodynamic technique has the advantage of identifying thermodynamic properties of CO2 capture reactions without any experimental input beyond crystallographic structural information of the solid phases involved. Such methodology not only can be used to search for good candidates from existing database of solid materials, but also can provide some guidelines for synthesis new materials. In this presentation, we apply our screening methodology to mixing solid systems to adjust the turnover temperature to help on developing CO2 capture Technologies.