Volumic rate

Thus, to maintain a unit gradient, a volume rate of energy dissipation equal to 77o is required. 

Now we return to consider the energy that must be dissipated in a unit volume of suspension to produce a unit gradient, as we did above with the pure solvent. The same fraction applied to the shearing force will produce the unit gradient, and the same fraction also describes the volume rate of energy dissipation compared to the situation described above for pure solvent. Since the latter was Po, we write for the suspension, in the case of dv/dy = 1,... 

This is only one of the contributions to the total volume rate of energy dissipation a second term which arises from explicit consideration of the individual spheres must also be taken into account. This second effect can be shown to equal 1.5 [Pg.588]

The ratios in parentheses express the constant volume rate per unit filter area. Hence, Equation 24 is the relationship between time i and pressure drop Ap. For incompressible cakes, rg is constant and independent of pressure. For compressible cakes, the relationship between time and pressure at constant-rate filtration is ... 

In practice, however, the liquid velocity relative to fixed particles, Uf, is not very useful. Instead, the velocity of settling relative to the walls of an apparatus, Uf - u, is of practical importance. The volume of the solid phase moving downward should be equal to that of liquid moving upward. This means that volume rates of these phases must be equal. Consider a column of slurry having a unit cross section and imagine the liquid and solid phases to have a well defined interface. The column of solid phase will have a base 1 - e, and the liquid column phase will have a base e. Hence, the volumetric rate of the solid column will be (1 - e)u, and that of the liquid column will be (Uf - u)e. Because these flowrates are equal to each other, we obtain... 

The point sink can approximate airflow near a hood with round or square/rectangular shape. The point sink will draw air equally from all directions (Fig. 7.83). The radial velocity (mys) at a distance r (m) from the sink can be calculated as a volume rate of exhaust airflow q (mVs) divided by the surface area of an imaginary sphere of radius r ... 

Specific flow The volumetric air change rate within a space, denoted by , the flow volume rate into and out of the space divided by the volume of the space. 

Volume Rate, Actual m /s Molecular Weight Viscosity, mPa-s Pressure, kPa (bar a) Temperature, °C Design Range, % of Normal... 

The volume rate of change factor, AV, is obtained from Figure 13-13 for single-acting cylinders and from Figure 13-14 for douhle-acting cylinders. 

Meter for Measuring Air (or Gas) Volume. A standard orifice meter is generally used to measure air (or gas) injection volume rates. 

There is a minimum air (or gas) volume rate of flow that must be maintained in order to adequately clean the bottom of the hole of cuttings and carry these... 

The volume rate of air flow, F, in cubic centi-1 meters per minute required to balance the settling velocity of the largest particle which it is desired to float is given by the following equation ... 

In an effort to account for this effect, Spalding and Johnson have considered the effect of radiation losses from the solid surface. Johnson has also included a provision for a volume rate of energy loss, but he does not state the basis for the term. In the case of surface pyrolysis, the resulting equations predict the relations of burning-rate versus pressure as shown in Fig. 16. 

X= 2) or (P = 0, X = 3) and the distinction between these possibilities is most satisfactorily based upon independent evidence, such as microscopic observations. The growth of compact nuclei inevitably results in the consumption of surfaces and when these outer faces, the sites of nucleation, have been eliminated, j3 necessarily is zero this may result in a diminution of n. The continued inward advance of the reaction interface at high a results in a situation comparable with the contracting volume reaction (discussed below) reference to this similarity was also made in consideration of the Mampel approach discussed above. Shapes of the deceleratory region of a time curves for nucleation and growth reactions and the contracting volume rate process are closely similar [409]. 

Rate at which mass enters the volume = Rate at which mass leaves the volume + Rate at which mass accumulates within the volume... 

The test substance Undeen (active ingredient propoxur, 200 g/L) was applied by hand-held, high-volume spraying equipment at an application rate of a minimum 25 g active ingredient (a.i.) per 1000 m2 and a volume rate of approximately 100 L/1000 m2. 

---