# Tag Info

1

This would be a better question for scicomp.stackexchange.com. But, in essence, the projection method refers to a two step process of integrating the velocity field. Incompressible solvers are designed to advance the velocity field so that it most acurately solves the discretized momentum equation. There are several methods available to do this, such as, the ...

2

It doesn't matter. If you have a scalar $\alpha$ then $$\alpha (\vec{B} \times \vec{C}) = (\alpha \vec{B}) \times \vec{C} = \vec{B} \times (\alpha \vec{C}).$$ You can prove this simply by writing out the components of each of the three expressions and showing that no matter which order you do it in you will get the same results.

36

It is exactly because we have a factor of $\frac 1 2$ in the area formula of a triangle. To understand what I'm saying, consider what is the $v(t)$ graph of a particle under constant acceleration. Some say, a good plot is worth a million words! :)

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