41 Cistern Program

[Gerson W. Barbosa]

(08-20-2016 06:57 PM)Csaba Tizedes Wrote:  

(08-20-2016 03:40 PM)Gerson W. Barbosa Wrote:  ... yes, there are ... simple exact formulas for parcial volumes are not possible, I think.

I guess you're know that the shape of the vessels' end (head) is depends on the application. Your example clearly shows that nearly flat bottoms are applicable for low pressure and for the higher pressure the standard bottom is suitable.

For vessel volume calculations the standards are includes the volume of each bottoms.
For partially filled tanks the standard or owner company also gives a tabulated volume depends on level inside the vessel (eg. horizontal fuel tanks under the ground) - because it has cost impact.

The real application is very simple: do not calculate anything if it has cost impact or if it has not, that is not real application You know it: Money makes the world go round.

Csaba

Yes, I've realized that vessels with rounded ends are mandatory for high pressure applications, like compressed air containers. But then again what is the point of calculating partial volumes in such cases?

"Money makes the world go round". Quite true! We have a similar phrase here (o dinheiro move o mundo).

I've found calculator and formulas for volume and base area of ellipsoidal caps at

http://keisan.casio.com/has10/SpecExec.c...1311572253

It appears their surface areas is the problem there is no simple solution to:

https://en.wikipedia.org/wiki/Ellipsoid

Gerson.