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Pipes geometry

For liquid/liquid separators, avoid severe piping geometry that can produce turbulence and homogenization. Provide an inlet diffuser cone and avoid shear-producing items, such as slots or holes. [Pg.137]

Tims it is possible to estimate order of magnitnde limits for detonation propagation nsing calcnlated CJ indnction zone lengths or measnred cell size data. These were limits for established detonations propagating into pipes of decreasing diameter. Variations in the detonability of different mixtnres in different pipe geometries are thns intimately linked to the initial chemical and physical properties of the mixtnre. [Pg.69]

From Eq. (63), the mechanical energy equation in head form, it is seen that, in the absence of a pump head, losses in a pipe system consist of pressure head changes, potential head changes, and velocity head changes. When fittings or changes in pipe geometry are encountered, additional losses occur. [Pg.276]

The first test is to compare a turbulent channel flow studied in the previous section and a laminar flow. A three dimensional Poiseuille flow in a pipe geometry was used as test case. The flow is laminar and the Reynolds number based on the bulk velocity and diameter is approximately 500. The bound-... [Pg.293]

Eggels, J. G. M., Direct and large eddy simulation of turbulent flow in a cylindrical pipe geometry, Ph.D. Thesis, Delft University (1994). [Pg.321]

The characteristics and complexity of flow pattern are such that most flows are described by a set of empirical or semi-empirical equations. These relate the pressure drop in the flow system as a function of flow rate, pipe geometry, and physical properties of the fluids. The aim in the design of fluid flow is to choose a line size and piping arrangement that achieve minimum capital and pumping costs. In addition, constraints on pressure drop and maximum allowable velocity in the process pipe should be maintained. These objectives require many trial and error computations, which can be performed well by a computer. [Pg.150]

Note that pAV = Constant along the pipe because of the conservation of mass, and this constant can be evaluated at any location in the pipe. Also, from the pipe geometry,... [Pg.95]

In a flashing nozzle, it is likely that evaporation starts before the hquid reaches the nozzle exit. Depending on the amount of vapor, liquid and vapor characteristics, velocity, and pipe geometry different flow regimes may be observed in a pipe leading to a nozzle. The flow regime inside a pipe depends on the flow quality X, defined as the ratio of vapor mass flow rate, m, to the total mass flow rate m ... [Pg.244]

It is noticeable that at low flow rates the agreement between all the calculated and measured data is excellent, but the simplified analytical solution deviates from the other results at Reynolds numbers of between 300 and 1,000. Above these values a comparison of the analytical and modified analytical data clearly demonstrates the increasing importance of even relatively minor changes of pipe geometry in affecting the overall pressure drop when pumping non-Newtonian suspensions. [Pg.523]

Since keff 0.96 for the 8-in. pipe, with contents as specified above (36.8 kg (81 lb) U-oil], an area of concern regarding the oil-uranium accumulation was the relationship of keff to different levels of moderation. The results of KENO-IV calculations are presented in Fig. 1. These results indicate that the mixture was at, or near, optimum moderation for the pipe geometry, and that changes in moderation did not significantly increase keff. [Pg.780]

When the imaginary tap is closed (that is, zero flow), the lead concentration increases over time as determined by M and E. When the imaginary tap is open, the concentration of lead in the emission from the pipe is either (i) a reflection of the steady state flushed condition (with lead concentrations normally below 1 pg/1 unless the lead pipe is very long) or (ii) it is determined by previous zero flow (stagnation) conditions, as influenced by pipe geometry and the extent of the flow event. It can be appreciated that the simulation of such events in each stirred tank for every second of flow leads to millions of calculations being performed for each simulated pipe. [Pg.82]

Equations for the design of laminar pipe flow can be derived by integrating Eqn. (5) over the circular pipe geometry (Govier Aziz, 1972). Because of the yield stress, a central solid plug is formed where the point shear stress is less than the yield stress, as shown in Figure 10. [Pg.163]

For either Cvs or Cvt, conection by piping geometry oonection factor (Fp) is not required,... [Pg.137]

Fp is piping geometry factor, defined by Eq. (3) P) is control valve inJet pressure, in psia Y is expansion factor X is control valve pressure drop ratio, which is the ratio of control valve pressure drop to control valve inlet pressure (absolute) M is vapor molecular weight Tl is control valve inlet temperature in °R (Rankine) ... [Pg.138]


See other pages where Pipes geometry is mentioned: [Pg.2303]    [Pg.437]    [Pg.185]    [Pg.59]    [Pg.95]    [Pg.192]    [Pg.221]    [Pg.121]    [Pg.2058]    [Pg.420]    [Pg.2597]    [Pg.976]    [Pg.228]    [Pg.2577]    [Pg.2307]    [Pg.7]    [Pg.7]    [Pg.12]    [Pg.72]    [Pg.319]    [Pg.628]    [Pg.754]    [Pg.226]    [Pg.171]    [Pg.101]    [Pg.405]    [Pg.36]    [Pg.118]    [Pg.141]    [Pg.195]    [Pg.243]    [Pg.306]   


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