CE 321

1
CE 321 Lab 2 Fluid Statics

• General Information
• Worksheet and Spreadsheets due Thursday by 12
  Noon
• Lab Reports due Tuesday by 4.00 pm

2
Hydrostatic Theory
Horizontal Plane

Resultant Force
3
Vertical Plane
... (1) (Theoretical)
(2)
4

• 
  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

5
Where,
resultant force
force produced by the mass placed on the tray,
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)
6
PPre
Pressure Prism for Partially and Fully submerged
case
Partially Submerged
Fully Submerged
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Post Lab Session Analysis

• Enter data into spreadsheet study the plot

Theo
Uncertainty explains inaccuracy
Uncertainty does not explain inaccuracy
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• 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