Velocity


Figure 3.1a shows a flash drum used to separate by gravity a vapor-liquid mixture. The velocity of the vapor through the flash drum must be less than the settling velocity of the liquid drops. Figure 3.11) shows a simple gravity settler for removing a  [c.68]

Figure 3.1c is a schematic diagram of gravity settling chamber. A mixture of vapor or liquid and solid particles enters at one end of a large chamber. Particles settle toward the fioor. The vertical height of the chamber divided by the settling velocity of the particles must give a time less than the residence time of the air.  [c.69]

Centrifugal separation. In the preceding processes, the particles were separated from the fluid by gravitational forces acting on the particles. Sometimes gravity separation may be too slow because of the closeness of the densities of the particles and the fluid, because of small particle size leading to low settling velocity, or because of the formation of a stable emulsion.  [c.71]

In situations where a low concentration of suspended solids needs to be separated from a liquid, then cross-flow filtration can be used. The most common design uses a porous tube. The suspension is passed through the tube at high velocity and is concentrated as the liquid flows through the porous medium. The turbulent flow prevents the formation of a filter cake, and the solids are removed as a more concentrated slurry.  [c.74]

By assuming a reasonable fluid velocity, together with fluid physical properties, standard heat transfer correlations can be used.  [c.219]

Deflagration. In a deflagration, the flame front travels through the flammable mixture relatively slowly, i.e., at subsonic velocity.  [c.257]

Detonation. In a detonation, the flame front travels as a shock wave, followed closely by a combustion wave, which releases the energy to sustain the shock wave. The detonation front travels with a velocity greater than the speed of sound in the unreacted medium.  [c.258]

Another suspended growth method is the upward-flow anaerobic sludge blanket illustrated in Fig. 11.6a. Here the sludge is contacted by upward flow of the feed at a velocity such that the sludge is not carried out of the top of the digester.  [c.316]

The constants and 2 are called velocity  [c.251]

The absolute or dynamic viscosity is defined as the ratio of shear resistance to the shear velocity gradient. This ratio is constant for Newtonian fluids.  [c.94]

LHSV liquid hourly space velocity  [c.502]

The basics of the method are simple. Reflections occur at all layers in the subsurface where an appreciable change in acoustic impedance is seen by the propagating wave. This acoustic impedance is the product of the sonic velocity and density of the formation. There are actually different wave types that propagate in solid rock, but the first arrival (i.e. fastest ray path) is normally the compressional or P wave. The two attributes that are measured are  [c.18]

Viscosity is measured in poise. If a force of one dyne, acting on one cm, maintains a velocity of 1 cm/s over a distance of 1 cm, then the fluid viscosity is one poise. For practical purposes, the centipoise (cP) is commonly used. The typical range of gas viscosity in the reservoir is 0.01 - 0.05 cP. By comparison, a typical water viscosity is 0.5 -I.OcP. Lower viscosities imply higher velocity for a given pressure drop, meaning that gas in the reservoir moves fast relative to oils and water, and is said to have a high mobility. This is further discussed in Section 7.  [c.107]

Oil viscosity is an important parameter required in predicting the fluid flow, both in the reservoir and in surface facilities, since the viscosity is a determinant of the velocity with which the fluid will flow under a given pressure drop. Oil viscosity is significantly greater than that of gas (typically 0.2 to 50 cP compared to 0.01 to 0.05 cP under reservoir conditions).  [c.109]

In centrifugal scruhhers (Fig. 11.26), an attempt is made to increase the relative velocity of particles and droplets by centrifuging the droplets in an outward direction.  [c.303]

The source is brought to a. positive poteptial (I/) of several kilovolts and the ions are extracted by a plate at ground potential. They acquire kinetic energy and thus velocity according to their mass and charge. They enter a magnetic field whose direction is perpendicular to their trajectory. Under the effect of the field, Bg, the trajectory is curved by Lorentz forces that produce a centripetal acceleration perpendicular to both the field and the velocity.  [c.47]


See pages that mention the term Velocity : [c.69]    [c.223]    [c.23]    [c.34]    [c.41]    [c.44]    [c.66]    [c.70]    [c.109]    [c.125]    [c.129]    [c.148]    [c.151]    [c.170]    [c.176]    [c.176]    [c.180]    [c.182]    [c.224]    [c.231]    [c.239]    [c.251]    [c.251]    [c.263]    [c.263]    [c.323]    [c.341]    [c.342]    [c.351]    [c.403]    [c.418]    [c.422]    [c.501]    [c.18]    [c.55]   
Computational chemistry using the PC (2003) -- [ c.19 ]

Modern analytical chemistry (2000) -- [ c.0 ]

Modern Analytical Chemistry (2000) -- [ c.0 ]

Turboexpanders and Process Applications (0) -- [ c.0 ]

Rules of thumb for chemical engineers (0) -- [ c.0 ]

Advanced control engineering (2001) -- [ c.16 ]

Industrial ventilation design guidebook (2001) -- [ c.0 ]

Applied Process Design for Chemical and Petrochemical Plants, Volume 1 (1999) -- [ c.126 , c.187 ]

Standard Handbook of Petroleum and Natural Gas Engineering Volume 1 (1996) -- [ c.138 ]