Courant Number

Courant number, abbreviated as Co, a dimensionless number, is the measure of how much information traverses a computational grid cell in a given time interval.

 

Courant Number formula
\(\large{ Co = \frac{ \Delta t \; U}{ \Delta x }  }\)
Symbol	English	Metric
\(\large{ Co }\) = Courant number	\(\large{dimensionless}\)
\(\large{ U }\) = magnitude of the velocity (whose dimension is length/time)	\(\large{\frac{ft}{sec}}\)	\(\large{\frac{m}{s}}\)
\(\large{ \Delta x }\) = distance between any two consecative points	\(\large{ ft }\)	\(\large{ m}\)
\(\large{ \Delta t }\) = time interval	\(\large{ sec}\)	\(\large{ s}\)