There are simulations which are related to fluid pressure.
Please check out [url=http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=266.0]Buoyant Force1[/url] or [url=http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=7.0]Buoyant Force2[/url]

I do not know if it is what you want. Because you did not have detail specification/information about the "fluid pressure" you would like to find.