Commit 5e43b11d authored by Olivier's avatar Olivier

Chapter 3: split with chapter 2 completed, proof-read.

parent f78a29e2
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\section{Balance of mass}
\label{ch_balance_mass_int_simple}
How much mass flow is coming in and out of the control volume? We answer this question by writing a mass balance equation. It compares the rate of change of the mass of the system (which by definition is zero, see eq.~\ref{eq_massconservation} p.\pageref{eq_massconservation}), to the rate of change of mass in the control volume:
\begin{IEEEeqnarray}{CCCCCCC}
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\section{Balance of momentum}
\label{ch_balance_momentum_simple}
What force is applied to the fluid for it to travel through the control volume? We answer this question by writing a momentum balance equation. It compares the rate of change of the momentum of the system (which by definition is the net force applying to it, see eq.~\ref{eq_secondlaw} p.\pageref{eq_secondlaw}), to the rate of change of momentum in the control volume:
\begin{IEEEeqnarray}{CCCCCCC}
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