Day04_pressure_1 - 1 Fluid Mechanics 3502 Fluid Mechanics 3502 Day 4(Fall 2008 Day 4(Fall 2008 Vapor Pressure(very briefly Chapter 3 Fluid Statics

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 9/11/2008 1 Fluid Mechanics 3502 Fluid Mechanics 3502 Day 4 (Fall, 2008) Day 4 (Fall, 2008) Vapor Pressure (very briefly) Chapter 3: Fluid Statics Part I y The basics y Gage pressure / piezometric pressure y Pressure on a solid surface Vapor Pressure Vapor Pressure y Analogy: boiling temperature ◦ Boiling temperature = temperature at which a liquid boils ◦ Below maintains a liquid ◦ Dependent on pressure y Vapor pressure ◦ Vapor pressure = pressure at which a liquid vaporizes ◦ Above, maintains a liquid ◦ Dependent on temperature (Need gas/liquid interface for this to be important – not such a strict limitation) Vapor pressure (cont’d) Vapor pressure (cont’d) y At a liquid / gas interface the liquid continuously vaporizes and condenses. y If the pressure in the gas above the liquid is higher than the vapor pressure, this reaches a steady state. y IF the pressure above the liquid is less than the vapor pressure more vaporization than condensation occurs pressure, more vaporization than condensation occurs and the liquid boils. y If the liquid is in a closed volume subjected to a vacuum, enough liquid vaporizes to form a gas phase above the liquid that exerts a “vapor” pressure on the liquid y In water at 20 ° C, the water vapor pressure is 2340 Pa Vapor pressure and engineering Vapor pressure and engineering design design - cavitation cavitation y Boiling associated with low pressures often occurs in localized low-pressure zones of flowing liquids, e.g., on the suction side of a pump. e....
View Full Document

This note was uploaded on 06/09/2010 for the course CIVIL 3502 taught by Professor Kimberlyhill during the Fall '08 term at University of Minnesota Crookston.

Page1 / 3

Day04_pressure_1 - 1 Fluid Mechanics 3502 Fluid Mechanics 3502 Day 4(Fall 2008 Day 4(Fall 2008 Vapor Pressure(very briefly Chapter 3 Fluid Statics

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online