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  2. Flow coefficient - Wikipedia

    en.wikipedia.org/wiki/Flow_coefficient

    For air flow at room temperature, when the outlet pressure is less than 1/2 the absolute inlet pressure, the flow becomes quite simple (although it reaches sonic velocity internally). With C v = 1.0 and 200 psia inlet pressure, the flow is 100 standard cubic feet per minute (scfm).

  3. Air-to-cloth ratio - Wikipedia

    en.wikipedia.org/wiki/Air-to-cloth_ratio

    The air-to-cloth ratio is the volumetric flow rate of air (m 3 /minute; SI m 3 /second) flowing through a dust collector's inlet duct divided by the total cloth area (m 2) in the filters. The result is expressed in units of velocity .

  4. Depth filter - Wikipedia

    en.wikipedia.org/wiki/Depth_filter

    The two conventional types of depth filter designs: the rapid and slow filters operate with velocities of 5–15 m/h and 0.1-0.2 m/h respectively; whereas pressurised sand filters have design flow rates of 238 L/min. [11] During operation the filter rate decreases due to increasing filter resistance as particulates get lodged within the media ...

  5. Superficial velocity - Wikipedia

    en.wikipedia.org/wiki/Superficial_velocity

    Superficial velocity (or superficial flow velocity), in engineering of multiphase flows and flows in porous media, is a hypothetical (artificial) flow velocity calculated as if the given phase or fluid were the only one flowing or present in a given cross sectional area. Other phases, particles, the skeleton of the porous medium, etc. present ...

  6. Standard cubic centimetres per minute - Wikipedia

    en.wikipedia.org/wiki/Standard_cubic_centimetres...

    One example of standard conditions for the calculation of SCCM is = 0 °C (273.15 K) [1] and = 1.01 bar (14.72 psia) and a unity compressibility factor = 1 (i.e., an ideal gas is used for the definition of SCCM). [2] This example is for the semi-conductor-manufacturing industry.

  7. Cross-flow filtration - Wikipedia

    en.wikipedia.org/wiki/Cross-flow_filtration

    Cross-flow filtration gets its name because the majority of the feed flow travels tangentially across the surface of the filter, rather than into the filter. [1] The principal advantage of this is that the filter cake (which can blind the filter) is substantially washed away during the filtration process, increasing the length of time that a ...

  8. Useful conversions and formulas for air dispersion modeling

    en.wikipedia.org/wiki/Useful_conversions_and...

    As an example, given a concentration of 260 mg/m 3 at sea level, calculate the equivalent concentration at an altitude of 1,800 meters: C a = 260 × 0.9877 18 = 208 mg/m 3 at 1,800 meters altitude Standard conditions for gas volumes

  9. Discharge coefficient - Wikipedia

    en.wikipedia.org/wiki/Discharge_coefficient

    In a nozzle or other constriction, the discharge coefficient (also known as coefficient of discharge or efflux coefficient) is the ratio of the actual discharge to the ideal discharge, [1] i.e., the ratio of the mass flow rate at the discharge end of the nozzle to that of an ideal nozzle which expands an identical working fluid from the same initial conditions to the same exit pressures.

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