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"Multi-phase flows are part of our natural environment such as tornadoes, typhoons, air and water pollution and volcanic activities as well as part of industrial technology such as power plants, combustion engines, propulsion systems, or chemical and biological industry. The industrial use of multi-phase systems requires analytical and numerical strategies for predicting their behavior. In its fourth extended edition the successful monograph package “Multiphase flow daynmics” contains theory, methods and practical experience for describing complex transient multi-phase processes in arbitrary geometrical configurations, providing a systematic presentation of the theory and practice of numerical multi-phase fluid dynamics.In the present first volume the local volume and time averaging is used to derive a complete set of conservation equations for three fluids each of them having multi components as constituents. Large parts of the book are devoted on the design of successful numerical methods for solving the obtained system of partial differential equations. Finally the analysis is repeated for boundary fitted curvilinear coordinate systems designing methods applicable for interconnected multi-blocks. "

"Air tanah yang memiliki kualitas baik terbentuk dalam jangka waktu yang cukup lama den berbanding terbalik dengan jangka waktu pengambilan yang dilakukan oleh manusia. Untuk menghindari timbulnya permasalahan baru, diperlukan suatu simulator yang dapat mensimulasi gerak aliran air tanah pada suatu daerah sehingga dapat diprediksi dampak pengambilan air tersebut. Skripsi ini mengembangkan model gerak aliran air tanah secara dua dimensi dengan menggunakan platformdan penyelesaian sederhana, penyelesaian temporal metode numerik Runge-Kutta Orde 4 untuk menjadi salah satu alternatif simulator gerak aliran air tanah yang dibutuhkan.

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Groundwater that has a good quality is formed in long time period inversely propotional to groundwater taken by humans. To avoid the emergence of new problems, we need a simulator that can simulate the movement of groundwater flow in a region that can predict the impact of taking water. This thesis is developing a groundwater flow model in two dimensions by using a simple platform and solution, temporal solution of numerical method Runge-Kutta 4th Order, to be an alternative simulator of groundwater flow that is needed."

"The book comprises an assembly of benchmarks and examples for porous media mechanics collected over the last twenty years. Analysis of thermo-hydro-mechanical-chemical (THMC) processes is essential to many applications in environmental engineering, such as geological waste deposition, geothermal energy utilisation, carbon capture and storage, water resources management, hydrology, even climate chance. In order to assess the feasibility as well as the safety of geotechnical applications, process-based modelling is the only tool to put numbers, i.e. to quantify future scenarios. This charges a huge responsibility concerning the reliability of computational tools. Benchmarking is an appropriate methodology to verify the quality of modelling tools based on best practices. Moreover, benchmarking and code comparison foster community efforts. The benchmark book is part of the OpenGeoSys initiative, an open source project to share knowledge and experience in environmental analysis and scientific computation."

"Numerical simulation of multiphase reactors with continuous liquid phase provides current research and findings in multiphase problems, which will assist researchers and engineers to advance this field. This is an ideal reference book for readers who are interested in design and scale-up of multiphase reactors and crystallizers, and using mathematical model and numerical simulation as tools.Yang and Mao?s book focuses on modeling and numerical applications directly in the chemical, petrochemical, and hydrometallurgical industries, rather than theories of multiphase flow. The content will help you to solve reacting flow problems and/or system design/optimization problems. The fundamentals and principles of flow and mass transfer in multiphase reactors with continuous liquid phase are covered, which will aid the reader?s understanding of multiphase reaction engineering."

"Multiphase flows are typically described assuming that the different phases are separated by a sharp interface, with appropriate boundary conditions. This approach breaks down whenever the lengthscale of the phenomenon that is being studied is comparable with the real interface thickness, as it happens, for example, in the coalescence and breakup of bubbles and drops, the wetting and dewetting of solid surfaces and, in general, im micro-devices. The diffuse interface model resolves these probems by assuming that all quantities can vary continuously, so that interfaces have a non-zero thickness. This book review the theory and describe some relevant applications of the diffuse interface model for one-component, two-phase fluids and for liquid binary mixtures, to model multiphase flows in confined geometries. "

"This book offers a fundamental and practical introduction to the use of computational methods, particularly finite element methods, in the simulation of fluid flows in porous media. It is the first book to cover a wide variety of flows, including single-phase, two-phase, black oil, volatile, compositional, nonisothermal, and chemical compositional flows in both ordinary porous and fractured porous media. In addition, a range of computational methods are used, and benchmark problems of nine comparative solution projects organized by the Society of Petroleum Engineers are presented for the first time in book form.Computational Methods for Multiphase Flows in Porous Media reviews multiphase flow equations and computational methods to introduce basic terminologies and notation. A thorough discussion of practical aspects of the subjects is presented in a consistent manner, and the level of treatment is rigorous without being unnecessarily abstract. Each chapter ends with bibliographic information and exercises."

"Air merupakan salah satu kebutuhan pokok bagi manusia. Untuk mendapatkan air tersebut sebagian besar manusia mengambil air dari tanah. Untuk mencegah terjadinya pencemaran lingkungan, karakteristik air tanah harus diketahui. Untuk mengetahui ketinggian muka air tanah, Laboratorium Hidrolika Fakultas Teknik Universitas Indonesia telah mengembangkan suatu model matematik untuk mensimulasi aliran air tanah. Untuk memastikan bahwa model ini dapat mensimulasi aliran air tanah seperti yang terjadi pada kondisi di lapangan, maka model matematik ini harus divalidasi di laboratorium sebelum dilakukan pengujian langsung di lapangan. Pada skripsi ini dilakukan pengujian model matematik di laboratorium dengan cara membandingkan hasil simulasi model matematik dengan hasil simulasi model fisik. Simulasi aliran air tanah yang dihasilkan oleh model fisik sesuai dengan teori dasar aliran air tanah, sehingga hasil simulasi aliran air tanah pada model fisik dapat dijadikan sebagai acuan untuk menguji model matematik. Hasil keluaran dari model matematik dapat dibandingkan dengan hasil keluaran model fisik. Oleh karena itu model matematik dinyatakan valid dalam kasus pengujian."

"Air bagi manusia dan mahluk hidup lainnya merupakan unsur penting yang harus dipenuhi sebagai kebutuhan dasar sehari-hari. Dalam upaya memenuhi kebutuhannya akan air, sebagian besar masyarakat menggunakan air tanah yang terdapat pada lapisan tanah jenuh air. Laboratorium Hidrolika, Hidrologi, dan Sungai Fakultas Teknik Universitas Indonesia telah mengembangkan suatu model matematika yang diharapkan dapat mensimulasikan aliran air tanah sehingga elevasi muka air tanah dan bentuk alirannya untuk suatu tempat pengamatan dapat diketahui. Perlu dilakukan pengujian secara fisik di laboratorium terlebih dahulu agar dapat teruji kevaliditasan model tersebut sehingga dapat mensimulasi keadaan sesungguhnya di alam. Proses pengujian tersebut dilakukan dengan cara melaksanakan serangkaian percobaan untuk kasus-kasus yang dapt mewakili kejadian sesungguhnya di alam, seperti kasus aliran tanah dengan lapisan kedap air di bagian hulu dan hilir, tanpa mengabaikan kriteria teori dasar air tanah tentang pengaruh keragaman akifer bebas terhadap tinggi tekanan dan perilaku aliran air tanah. Setelah dilakukan pengujian, ternyata model matematik tersebut mampu memberikan hasil simulasi yang menyerupai hasil simulasi fisik dan sesuai dengan teori dasar aliran sehingga model matematik tersebut dapat dikatakan valid. Selanjutnya model matematik tersebut dapat digunakan untuk melakukan simulasi fisik di lapangan yang hasilnya dapat dipertanggungjawabkan."