The weight of a gas or airflow going into a vacuum system. Usually expressed in SCFM or Pounds per Hour and is then converted to volume flow (ACFM) for pump sizing.
Also called normal flow or standard flow. The mass flow rate can be thought of as what the volume flow rte would be if the gas flowing through the line were at standard conditions. Actual line pressure and temperature affect the density of the gas, which contracts (above atmospheric pressure and / or low temperature) or expands (under vacuum and / or high temperature), and thus affects the measured volume flow rate. This means that the exact same number of molecules of gas flow can be measured as radically different volume flows when the temperature or pressure is fluctuating. Some mass flow meters have an absolute pressure sensor, temperature sensor or other technique to determine and compensate for variable gas density on the fly. This means that a change in mass flow reading is known to mean an actual change in the number of gas molecules as opposed to a simple change in the gas density. In addition, when the volumetric flow rate is corrected to standard conditions, it is a simple matter to multiply the mass flow rate by the density of the gas at standard conditions (commonly published) to determine actual mass flow rate (e.g. grams / minute)
Mass flow is the flow pattern in a hopper or silo characterised by the fact that no stagnant zones are present, i.e. that all parts of the particualte solid including those adjacent to the wall, are moving when the hopper is discharged.
true mass flow where the measurement is a direct reading of the mass of the fluid not just the volume or velocity.
movement of nutrients with the overall flow of water to plant roots.
In physics, mass is the measure of a body's resistance to acceleration. The mass of a body is different from, but proportional to, its weight. In automotive circles, mass flow refers to the amount of air that can be pumped into each cylinder. Mass flow is proportional to air density. The greater the density, the greater the mass. –Å‘1/2‚ÉŽg‚¤Œ3/4—t‚¶‚á‚È‚¢‚µˆÓ–¡‚à‚³‚Á‚Ï‚èB yMechanical secondaryzƒvƒ‰ƒCƒ}ƒŠ‚Æ‹@ŠB“I‚ɘAŒ‹‚³‚ê‚éƒZƒJƒ“ƒ_ƒŠ‚Ì‚±‚ÆB
Mass flow is the movement of substances at equal rates or as a single body. For example, blood circulation, transport of water and assimilates in xylem vessels and phloem tubes of plants. This relies upon the cohesion of water molecules to each other and adhesion to the vessel's wall by hydrogen bonding.