velocity coefficient


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velocity coefficient

[və′läs·əd·ē ‚kō·i‚fish·ənt]
(fluid mechanics)
The ratio of the actual velocity of gas emerging from a nozzle to the velocity calculated under ideal conditions; it is less than 1 because of friction losses. Also known as coefficient of velocity.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
(1) The hydraulic design of desulfurization dust removal centrifugal pump was carried out by the velocity coefficient method, and the main structural parameters of impeller and volute were obtained.
where [c.sub.1] and [c.sub.2] are the group velocity coefficients, [alpha], [beta], and [gamma] are the parameters related to nonlinear effects, and [[DELTA].sub.j], [K.sub.j] (j = 1, 2) are related to the linear effects.
where x: carbonation velocity coefficient; A: carbonation-rate, mm/[square root of week]; B: carbonation depth at the start of carbonation acceleration, mm.
After 4 weeks of curing in water and 4 weeks of curing in air, because the self-carbonation caused by pozzolanic reaction of fly ash is negligible, it is considered that carbonation velocity coefficient is roughly equal in the same water-cement ratio regardless of fly ash replacement ratio.
Figure 10 shows the relationship between fly ash replacement ratio of different precuring pattern and carbonation velocity coefficient. From this figure, owing to the different precuring mode, carbonation velocity coefficients of PL and ST concrete without adding fly ash were largely affected by precuring, unrelated to the air content.
In the case of the interaction of genotypes in different stress levels, it was seen that the treatment combination of control with the cultivar africanum had the lowest germination duration and highest germination index, germination rate index, final germination percentage and germination velocity coefficient.
FGP (Final Ng/N1 x 100 [N.sub.g] = number of germination germinated seeds percentage) [N.sub.1] = number of evaluated seeds MET (Germination 1/(CVG) CVG = germination mean time) velocity coefficient Table 3: Germination indices under various stress levels of various studied sub-convars.
Table 2 presents the gate velocity and velocity coefficient of discharge.
In pressurized systems, the velocity coefficient of discharge for the first gate is more than the second.
By increasing the gate-to-sprue area (G/S) and runner-to-sprue area (R/S) ratios, the velocity coefficient of discharge (CdV) in all systems is increased.
However, better predictions could likely be made for a given limpet species with unmeasured [S.sub.d,pr] by finding in Table 6 the species whose shell is closest in shape and using the corresponding values for shape and velocity coefficients. Shape coefficients for lift are more difficult to predict in limpets than are shape coefficients for drag.
Note that the shape and velocity coefficients listed in Tables 6 and 7 were obtained from data relating the time-averaged water velocity to the corresponding time-averaged hydrodynamic force.