[Fluid Mechanics] Topic 2 - Introduction to pressure

17 flashcards · Other · by Ahmed Adil

  1. What is pressure? mention the formula and the unit (SI and US)

    Amount of perpendicular force applied on a unit area of a substance or on a surface pressure = force / area N/m2 or Pascal (Pa) psi lb/in2

  2. 1 bar = 10^5 Pa = 0.1 MPa = 100 KPa

  3. The pressure and density decrease with increasing height in the atmosphere

  4. The actual pressure at a given position. It is measured relative to absolute vacuum (i.e. absolute zero pressure)

    Absolute pressure

  5. The difference between the absolute pressure and the local atmospheric pressure.

    Gauge pressure

  6. Most pressure-measuring devices are calibrated to read zero in the atmosphere, and so they indicate gauge pressure

  7. Pressures below atmospheric pressure

    Vacuum pressures

  8. A) 101325 B) 101.325 C) 1.01325

  9. 14.696

  10. Reminder: If local atmospheric pressure was not given, use the default value 101.325 kPa or 14.696 psi

  11. Piezometer

  12. Open End U-tube Monometer (for gases)

  13. Differential U-tube Monometer (for gases)

  14. Inclined Monometer (for low pressure gases)

  15. Bourdon Tube Gage

  16. Barometer

  17. Pressure Transducer