The following ﬁgures provide a summary and recommendations of discretisation schemes for diﬀerent equations. We start with momentum conservation Eq. (2.49 ), described in Sec. 2.13 and Sec. 2.14 , for which accuracy is the main consideration in scheme selection.
The discretisation of an equation for a bounded scalar ﬁeld is illustrated using the equation from the turbulence model (assuming constant ). Schemes are selected with an emphasis on boundedness.