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# CE 321 Lab 1 – Fluid Statics - PowerPoint PPT Presentation

CE 321 Lab 1 – Fluid Statics. Hydrostatic Theory . Horizontal Plane . Resultant Force = . Centroid= h/2 . Vertical Plane . ……………………………... (1) (Theoretical). …………………… (2). Objectives

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Lab 1 – Fluid Statics

Horizontal Plane

Resultant Force =

Vertical Plane

……………………………... (1) (Theoretical)

…………………… (2)

• Objectives

• Experimentally verify the accuracy of the equation derived from

Hydrostatic theory to predict the location of center of pressure

• Determine if uncertainty in measurements appear to explain the

inaccuracy in predicting the location of center of pressure using

the equation derived from Hydrostatic theory

• Comment on the suitability of the equation derived from Hydrostatic

theory for engineering use

L1

L4

CW

Pivot

L3

L2

W

yR

l

d

FR

w

Where,

= force produced by the mass placed on the tray,

= resultant force

= length of the arm where resultant force acts

= length of the arm where W acts

= location on the submerged plane where resultant force is acting

(Experimental)

Pressure Prism for Partially and Fully submerged case

Partially Submerged

Fully Submerged

• Enter data into spreadsheet & study the plot

Theo

Uncertainty explains inaccuracy

Uncertainty does not explain inaccuracy

• In order to answer each objective

• NOTE: Consider the two cases (partially and fully submerged) separately for each objective

• Objective 1

• Consider the inaccuracy in both the 2 cases separately

• Look at Error ( Relative error)

• Objective 2

• Look at the plot and comment

• Compare Error and Propagated uncertainty. Does uncertainty account for inaccuracy?

• Objective 3

• Comment on suitability of Eq.1. for engineering use

• Consider inaccuracy, uncertainty and state the logic behind your conclusion