- #1
Apashanka
- 429
- 15
While doing some calculations I came across some terms which are ##\frac{(v•\vec \nabla)v}{a(t)}## and ##\vec \nabla•[\rho(1+\delta)v]## where all quantities have spatial dependence other than "a" which has only time dependence ,
the first term here is canceled and the the second term is rewritten as ##\frac{\rho(\nabla•v)}{a}## and the argument is given "retaining only linear terms of ##v /\delta##"
Can anyone please help me in how to check this out??
the first term here is canceled and the the second term is rewritten as ##\frac{\rho(\nabla•v)}{a}## and the argument is given "retaining only linear terms of ##v /\delta##"
Can anyone please help me in how to check this out??