# Modeling Density-Driven Flow in Porous Media

Modeling Density-Driven Flow in Porous Media Principles, Numerics, Software by Ekkehard O. Holzbecher

## Preface to Modeling Density-Driven Flow in Porous Media PDF

Modeling density-driven flow in porous media’ as a multidisciplinary topic is of interest to a wide range of students, scientists and technicians. Like ‘density-driven flow’ itself, this book is composed of an array of aspects.

The book is intended not only for people at different levels, but for people from different disciplines: geologists, engineers, physicists, mathematicians.

For any given reader, this means some aspects are neither relevant, interesting, nor understandable. If you find yourself trapped in a scientific discourse that does not belong to your field and range of application, please don’t worry!

Geologists can skip all that stuff on bifurcations! Mathematicians have no need to go into the details of salt-dome formations!

The book can be broadly divided in four parts. Part One, chapters 1-4, provide the basics. Part Two, chapters 5-7, tackle convection.

Part Three, chapters 8-10, deals with flow patterns induced by temperature differences (thermal problems).

Part Four, chapters 11-14, examines salt concentrations as origin of flow patterns (saline problems). Software is included on CD-ROM allowing the user to independently model problems of density-driven flow.

The programs are much more than a demonstration of the textbook examples. There are some limitations, of course, and these are noted.

A user-friendly interface helps the modeler with input data. The practice of modeling density-driven flow still has obstacles, such as errors in input data, inconsistencies in the conceptual model, insufficiently small discrete parameters, insufficiently large hardware memory.

Most of these obstacles are not specifically reported by the software, but they are noticeable when the output shows impossible patterns, the algorithm does not converge or the program crashes.

Coping with these situations is easier if the modeler has a well founded understanding of the processes and of the program structure.

This book is intended to provide a convenient tool for gaining this understanding and for helping those who want to set up good models of density-driven flow with the FAST-C(2D) code or with other software.