\chapterauthor{Alan Gray and Kevin Stratford}{EPCC, The University of Edinburgh}
-\chapter{Ludwig: multiple GPUs for a complex fluid lattice Boltzmann
+\chapter[Ludwig: multiple GPUs for a fluid lattice Boltzmann
+application]{Ludwig: multiple GPUs for a complex fluid lattice Boltzmann
application}
%\putbib[biblio]
\section{Introduction}
-The lattice Boltzmann (LB) method (for an overview see, e.g.,
+The lattice Boltzmann (LB) method \index{Lattice Boltzmann method} (for an overview see, e.g.,
\cite{succi-book}) has become a popular approach to a variety of fluid
dynamics problems. It provides a way to solve the incompressible,
isothermal Navier-Stokes equations and has the attractive features of
beyond the bare Navier-Stokes equations to provide a full
description~\cite{aidun2010}. The representation of this extra
physics raises additional design questions for the application
-programmer. Here, we consider the \textit{Ludwig} code \cite{desplat},
+programmer. Here, we consider the \textit{Ludwig} code \cite{desplat}\index{Ludwig code},
an LB application developed specifically for complex fluids
(\textit{Ludwig} was named for Boltzmann, 1844--1906).
We will present the steps
