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The U-Tube Manometer
The U-Tube Manometer

Pressure in Fluids - University of Toronto Physics
Pressure in Fluids - University of Toronto Physics

... When you add liquids of different densities, the higher density liquid would tend to settle at the bottom of the container. The denser liquid exerts more pressure due to gravity, thus pushing the lighter material out of its way. That is why oil will float on the top of water and why air bubbles also ...
How do wings work?
How do wings work?

... streamlines can be traced right back into this person’s lungs. There is no connection with the ‘streamlines’ underneath the paper and Bernoulli’s equation cannot be applied to compare the pressure in the two regions2 . In fact, the pressure in the air blown out of the lungs is equal to that of the s ...
How do wings work? - Department of Engineering
How do wings work? - Department of Engineering

... streamlines can be traced right back into this person’s lungs. There is no connection with the ‘streamlines’ underneath the paper and Bernoulli’s equation cannot be applied to compare the pressure in the two regions2 . In fact, the pressure in the air blown out of the lungs is equal to that of the s ...
NUMERICAL SIMULATION OF CAVITATING FLOWS IN
NUMERICAL SIMULATION OF CAVITATING FLOWS IN

... velocities expressed in the local base. After calculations of characteristic equations, the conservative system at the exit can be written: ...
The Establishment and Verification of 90° Elbow Pipe with Circular
The Establishment and Verification of 90° Elbow Pipe with Circular

... Abstract. The flowing condition and the pressure on inner surface of ethylene in the 90°elbow pipe were simulated by means of FLUENT software, on the condition of 4 kinds of fluid density ρ, fluid inlet velocity v, fluid outlet pressure P0, degree curvature k=R/d respectively. The database of elbow ...
fluid flow motion of objects in fluids
fluid flow motion of objects in fluids

... layers of the fluid due to friction (viscosity). The velocity of these layers decreases with distance from the object's surface and at a certain distance the fluid is virtually undisturbed by the motion of the object. The object is surrounded by a layer of the fluid in which there is a velocity grad ...
the design of vortex induced vibration fluid kinetic energy harvesters
the design of vortex induced vibration fluid kinetic energy harvesters

... energy sources become the bottleneck in most of the applications. In order to extend the usable range of environment energy sources, a fluid kinetic energy harvester is proposed. Compared to a hydro-turbine structure it is more robust and has a better performance at smaller scale. The related theore ...
wind presentation
wind presentation

... Pitot Tube and Bernoulli Eqn. • Frictionless flow with only mechanical energy – No heat transfer – No change in internal energy ...
PowerPoint 演示文稿
PowerPoint 演示文稿

mechanical_sensors_17august
mechanical_sensors_17august

... is allowed to die down then measurement is made. ...
Physics: Principles and Applications
Physics: Principles and Applications

v P 2
v P 2

... Pdepth=0=Patmospheric=1.013x105 Pa = 1 atm =760 Torr From Pascal’s principle: If P0 changes then the pressures at all depths changes with the same value. PHY 231 ...
Chapter Three Static Fluid and its Application
Chapter Three Static Fluid and its Application

Unit II
Unit II

...  Interference Drag – turbulence due to conflict between two boundary layers.  Leakage Drag – caused by air flowing from high to low pressure, potentially interrupting smooth boundary layer flow. Drag Equation: D = CDqS = CDV2S / 295.37. Non-symmetrical airfoil produces a pitching moment at zero l ...
Chapter 2 Fluid Static
Chapter 2 Fluid Static

How an Airfoil Generates Lift
How an Airfoil Generates Lift

... A positive angel of attack generates a low pressure system on an airfoil’s upper surface. This is due to the fact that the air molecules are traveling at a greater velocity relative to the ones on the lower surface. Below the camber line a high pressure system forms as a consequence of the low speed ...
Pressure in a fluid
Pressure in a fluid

Pressure Instrument Selection Criteria Pressure measurement
Pressure Instrument Selection Criteria Pressure measurement

The Relation between the Coefficient of Friction and Pressure Drop
The Relation between the Coefficient of Friction and Pressure Drop

Abstract
Abstract

... Pore fluid pressure plays an important role in the frictional strength and stability of tectonic faults. We report on laboratory measurements of porosity changes associated with transient stressing during frictional sliding within simulated granular fault gouge. We use our measurements to model tran ...
Temperature, Pressure and Density
Temperature, Pressure and Density

... column up to the height concerned.  The relationship between pressure and height is governed by the pressure-height equation.  The height indicated on an altimeter is directly dependent on the surface pressure and the mean temperature of the air column from the surface up to the height of the alti ...
The impact of debris flows on structures
The impact of debris flows on structures

Lecture 14
Lecture 14

... • Experimental Fact: Pressure depends on depth. • See figure. If a static fluid is in a container, all portions of the fluid must be in static equilibrium. ...
De Supersuck-Zelflozer - Twaalfvoetsjollenclub
De Supersuck-Zelflozer - Twaalfvoetsjollenclub

... ‘throat’. This is the point where the water velocity is a maximum and its pressure is a minimum. There is a passage from the inside the dinghy to this throat. If the pressure at the throat is less than the pressure inside the dinghy, water will be extracted. The design of the supersuck has been inve ...
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Blower door



A blower door is a machine used to measure the airtightness of buildings. It can also be used to measure airflow between building zones, to test ductwork airtightness and to help physically locate air leakage sites in the building envelope.There are three primary components to a blower door: (1) a calibrated, variable-speed fan, capable of inducing a range of airflows sufficient to pressurize and depressurize a variety of building sizes, (2) a pressure measurement instrument, called a manometer, to simultaneously measure the pressure differential induced across the face of the fan and across the building envelope, as a result of fan airflow, and (3) a mounting system, used to mount the fan in a building opening, such as a door or a window.Air Tightness Testing is usually thought of in residential settings. It is becoming more common in commercial settings. The General Services Administration (GSA) requires testing of new US federal government buildings.A variety of blower door airtightness metrics can be produced using the combination of building-to-outside pressure and fan airflow measurements. These metrics differ in their measurement methods, calculation and uses. Blower door tests are used by building researchers, weatherization crews, home performance contractors, home energy auditors, and others in efforts to assess the construction quality of the building envelope, locate air leakage pathways, assess how much ventilation is supplied by the air leakage, assess the energy losses resulting from that air leakage, determine if the building too tight or too loose, determine if the building needs mechanical ventilation and to assess compliance with building performance standards.
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