An Integrated Finite Difference (IFD) technique is developed to solve the governing differential equations of the pressure-based model for transient coupled heat and moisture transfer in unsaturated porous media. The technique accommodates complex geometries, wide variation of nonlinear material properties, and Neuman and Dirichlet boundary conditions. A computer code, TRUCHAMP, which incorporates the IFD formulation is presented. Validation of the program has been made by producing mass and energy conservative solutions. Additionally, comparison of results obtained from the TRUCHAMP with those generated by independently developed numerical models yielded excellent correlation. With proper characterization of the material properties and boundary conditions, TRUCHAMP can be employed as a useful tool in assessing the thermal and hydraulic response of the prototype disposal vault for high-level nuclear waste. This program will be useful in solving many heat and mass transport problems encountered in the field of heat storage and underground power cables.

Computational Methods for Multiphase Flows in Porous Media 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. The book 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. Audience: this book can be used as a textbook for graduate or advanced undergraduate students in geology, petroleum engineering, and applied mathematics; as a reference book for professionals in these fields, as well as scientists working in the area of petroleum reservoir simulation; as a handbook for employees in the oil industry who need a basic understanding of modeling and computational method concepts; and by researchers in hydrology, environmental remediation, and some areas of biological tissue modeling. Calculus, physics, and some acquaintance with partial differential equations and simple matrix algebra are necessary prerequisites.

Containment and permeable reactive barriers have come full circle as an acceptable environmental control technology during the past 30 years. As interest shifted back toward containment in the 1990s, the industry found itself relying largely on pre-1980s technology. Fortunately, in the past 10 years important advances have occurred in several areas