Center of pressure & Position of Center of pressure

 #Fluid mechanics (Hydraulics):

• दबाव का केंद्र क्या है?
 उत्तर :समतल सतह पर दबाव का केंद्र वह  बिंदु होता है जिस पर परिणामी बल कार्य कर रहा होता है |

•What is center of pressure ?
 Answer : 

In plane surface the centre of pressure is the point of application on which the resultant force is acting.

The center of pressure is the point where the total sum of a pressure field acts on a body, causing a force to act through that point. The total force vector acting at the center of pressure is the value of the integrated vectorial pressure field. The resultant force and center of pressure location produce equivalent force and moment on the body as the original pressure field. Pressure fields occur in both static and dynamic fluid mechanics. Specification of the center of pressure, the reference point from which the center of pressure is referenced, and the associated force vector allows the moment generated about any point to be computed by a translation from the reference point to the desired new point. It is common for the center of pressure to be located on the body, but in fluid flows it is possible for the pressure field to exert a moment on the body of such magnitude that the center of pressure is located outside the body

Centre of Pressure depth

The centre of pressure for certain bodies are: 

(a) Rectangular with face coinciding with free surface

(b) Triangle with base at the free surface


(c) Triangle with apex at free surface

(d) Circle touching free surface

Question : The position of center of pressure on a plane surface immersed vertically in a static mass of fluid is

A. at the centroid of the submerged area

B. always above the centroid of the area

C. always below the centroid of the area

D. none of the above

Answer: Option C