space velocity


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space velocity

See radial velocity.

space velocity

[′spās və‚läs·əd·ē]
(astronomy)
A star's true velocity with reference to the sun.
(chemical engineering)
The relationship between feed rate and reactor volume in a flow process; defined as the volume or weight of feed (measured at standard conditions) per unit time per unit volume of reactor (or per unit weight of catalyst).
References in periodicals archive ?
The NOx storage as a function of the LNT substrate temperature and space velocity is presented in Figure 7.
The flow rate was held at 6.4 L/min, resulting in a space velocity of 30,000 [h.sup.-1] for a 2.54 cm x 2.54 cm monolithic core sample.
Similarly, it is possible to efficiently convert from any world space velocity v to the principal velocity [[v.sub.x], [v.sub.y]] and back using (13) and 14), respectively as follows:
Most worried about this development would be his partymen who are perhaps still trying to educate themselves on space velocity, if only to keep pace with him.
It has a total space velocity close to 300 km per second (much of it sideways with respect to the galaxy's plane).
One additional operation point with continuously changing exhaust gas recirculation (EGR) rate was chosen, resulting in a more dynamic condition with strong changes in space velocity and N[O.sub.x] emissions.
The ability of LNTs to extract [NO.sub.x] from the exhaust mass flow is limited, amongst others, by space velocity. When the exhaust flow is high, e.g.
The dynamical space velocity has been detected with numerous techniques, dating back to the 1st detection, the Michelson-Morley experiment of 1887, which was misunderstood, and which lead to physics developing flawed theories of the various phenomena noted above.
This is some 10 times faster than Regulus's space velocity relative to the Sun.
Whether AS/ABS deposits promote or inhibit SCR reactions seems to depend on a number of parameters like S[O.sub.2] concentration, [H.sub.2]O concentration, exhaust space velocity and temperature.
The analysis above for the Zener diode also applies to this decay process: the major effect is the changing barrier height produced by space velocity fluctuations that affect the nucleus energy more than it affects the [alpha] energy.