Dear all,

What's the difference between Static (Thermodynamic) Pressure and Hydrostatic Pressure? Any example or some equations to show the difference?

Your any answer will be highly appreciated.

Liwau

Helloo,, I'm not an experince person, however I think the hydrostatic pressure is related to stationary liduid whereas the static is dealing with gases in closed container. I may be wrong! Let's hear from the rest

Hi Liwau,

Static pressure is the pressure of the fluid at that point. Total pressure is static pressure plus the dynamic head (0.5*density*V^2), and represents the static pressure which would result if a moving fluid was brought to rest with no losses - the pressure would increase due to Bernoulli. Hydrostatic pressure is the pressure in a fluid due to the weight of fluid above it, for instance air pressure is a result of the weight of air in the atmosphere above you.

In CFX, static and total pressures are available in CFX-Post. Hydrostatic pressure is only applicable when you have defined a gravity vector, and this is usually for a natural convection simulation.

Regards, Glenn

[Mahmoud Abbaszadeh]

Static pressure refers to the pressure exerted by a fluid on a solid surface that is in contact with it. It is a measure of the force per unit area acting perpendicular to the surface. In contrast, hydrostatic pressure is the pressure exerted by a fluid on a submerged object, due to the weight of the fluid above it. It is a measure of the force per unit area acting in all directions at a given depth in a fluid. Hydrostatic pressure is a result of the weight of the fluid acting on an object submerged in the fluid, while static pressure is a result of the fluid pushing on a solid surface.