By A. A. Mammoli, C. A. Brebbia

Including turbulence, multiphase circulate is still probably the most demanding components of computational mechanics and experimental tools and diverse difficulties stay unsolved up to now. Multiphase flows are present in all parts of expertise, in any respect size scales and movement regimes. The fluids concerned should be compressible or incompressible, linear or nonlinear. as a result complexity of the issues, it is usually necessary to make the most of complicated computational and experimental the way to resolve the advanced equations that describe them. demanding situations in those simulations contain modelling and monitoring interfaces, facing a number of size scales, modelling nonlinear fluids, treating drop breakup and coalescence, characterizing part buildings, etc. Experimental strategies, even supposing pricey and hard to accomplish, are necessary to validate versions. This booklet includes papers offered on the 5th foreign convention on Computational tools in Multiphase movement, that are grouped into the next subject matters: Multiphase move Simulation; interplay of fuel, beverages and Solids; Turbulent movement; Environmental Multiphase circulate; Bubble and Drop Dynamics; stream in Porous Media; warmth move; snapshot Processing; Interfacial Behaviour.

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Extra resources for Computational Methods in Multiphase Flow V (WIT Transactions on the Engineering Sciences) (Wit Transactions on Engineering Sciences)

Example text

4)) is here determined, both experimentally and numerically, for each of the two impeller-tank configurations used. 2 Experimental determination of the Np – Re – Fr relation for Newtonian liquids In order to determine this relation for the two impeller-tank configurations in an extended range of Reynolds number (Re), different Newtonian liquids are used: 1. In order to investigate the low Re range, a mixture of glycerine and water (97%) at different temperatures (10°C, 15°C, 20°C, 25°C, 30°C, 35°C, 40°C, 50°C and 60°C) is used.

11] have evaluated the pressure change in a sudden expansion duct. Moreover, some of them (Aloui and Souhar [6]; Ahmed et al. [10]) have measured the bubble velocities and local void fraction to characterize the flow regime downstream from the singularity. The lack of studies in progressive enlargements in two-phase flow in the literature makes such an investigation more appealing. In this paper, progressive contraction and divergence geometry of different opening angles is considered. The latter is compared to the case of sudden expansion.

378 · G21 (1 − σ )2 1 + x 2ρL ρL −1 ρG (5) . 56 and angle 9◦ is studied. The geometry is identical to the test section shown in Figure 5 with a scaling factor of 1/2 (DN40/32). 2. Pressure transducers of type Validyne are used for this experimental campaign with the same acquisition time (tacq. = 1 min) and sampling frequency (fsampling = 2 Hz). The different membranes that cover all the range of the pressure measurements are: 1. 2 kPa 2. 6 kPa 3. Calibrated at 0–35 kPa Additionally, numerical simulations are carried out with the commercial CFD code Fluent.

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