- #1
ahmedbadr
- 29
- 0
well,i ve some problems with bernouuli equation.first,i'd like to ask abt meaning of static pressure in flowing fluid because i really ve read abt that in references and many websites but still can't get exactly what's meaningt of static pressure in flowing fluid.
i ve read on website that it's the pressure which exerted on plane parrallel to the flow while another website says static pressure in flowing fluid has direction normal to the flow.also before in reference that pressure ius scalal quantity (no direction) which means its equal on any point in all directions.
that was my 1st question ,my 2nd question abt what makes this static pressure changes while fluid is flowing because I've read that it's wrong to think that change of velocity causes change of pressure but change of pressure which causes change of velcity.but the real cause of change of pressure is obstruction i can't also get exactly how this obstruction change pressure like when cross section decreases pressure decreases why?
i ve read on website that it's the pressure which exerted on plane parrallel to the flow while another website says static pressure in flowing fluid has direction normal to the flow.also before in reference that pressure ius scalal quantity (no direction) which means its equal on any point in all directions.
that was my 1st question ,my 2nd question abt what makes this static pressure changes while fluid is flowing because I've read that it's wrong to think that change of velocity causes change of pressure but change of pressure which causes change of velcity.but the real cause of change of pressure is obstruction i can't also get exactly how this obstruction change pressure like when cross section decreases pressure decreases why?