modified pressure

{{Short description|Study of modified pressure}}

{{onesource|date=May 2015}}

Some systems in fluid dynamics involve a fluid being subject to conservative body forces. Since a conservative body force is the gradient of some potential function, it has the same effect as a gradient in fluid pressure.{{Cite book |last=Bansal |first=R. K. |url=https://books.google.com/books?id=FzQz6A6SnyoC |title=A Textbook of Fluid Mechanics |date=February 2005 |publisher=Firewall Media |isbn=978-81-318-0294-6 |language=en}} It is often convenient to define a modified pressure equal to the true fluid pressure plus the potential.

Examples of conservative body forces include gravity and the centrifugal force in a rotating reference frame.