met 212 _3
DESCRIPTION
TRANSCRIPT
04/10/2023
MET 212Fluid Mechanics
Lecture # 3
Objective
Fluid Pressure Pressure at Point Basic Equation For Pressure Filed
Incompressible Fluid Compressible FluidExample
Pressure MeasurementManometer
Piezometer Tube U-Tube Manometer Inclined-Tube Manometer
04/10/2023
04/10/2023
Fluid pressure
θ
θ
x
z
y
2zyx
yxzp
sxsp
y
s
x
`zzxyp
Pressure at Point
04/10/2023
04/10/2023
04/10/2023
Basic Equation For Pressure Filed
dz
dp
This equation indicate that the pressure gradient in vertical direction is negative that is the pressure decrease as we move upward in the fluid at reset
Incompressible Fluid ( ρ ) constant ( g )in most of fluid application is neglected
21 phP Compressible flow
( ρ ) is not constant TRp
0
1212
)(exp
RT
zzgpP
04/10/2023
Basic Equation For Pressure Filed
ExampleOpen
Gasoline
Water
17 ft
3 ft
A tank has a gasoline and water as shown in the Figure. If the SG of gasoline is 0.68 determine the pressure at the gasoline water interface and at the bottom of the tank
04/10/2023
Pressure Measurement
ManometerManometer has three types:
Piezometer TubeU-Tube ManometerInclined-Tube Manometer
04/10/2023
Piezometer Tube
11hPA
04/10/2023
U-Tube Manometer
1122 hhpA
04/10/2023
U-Tube Manometer
Example
04/10/2023
U-Tube Manometer
0.2 m
A+
B+
0.3 m
h ??
Water
OilMercury
0.17 m
h ?