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** Mat Porosity and Pore Size Distribution **

** Pore network modelling porosity distributions **

** Porosities and pore size distributions **

** Porosity and velocity distribution **

The PDR (Porosity/Distributed Resistance) method for describing the geometry (Patankar and Spalding)... [Pg.367]

Although the status of many 3D codes makes it possible to carry out detailed scenario calculations, further work is needed. This is particularly so for 1) development and verification of the porosity/distributed resistance model for explosion propagation in high density obstacle fields 2) improvement of the turbulent combustion model, and 3) development of a model for deflagration to detonation transition. More data are needed to enable verification of the model in high density geometries. This is particularly needed for onshore process plant geometries. [Pg.381]

The washing of filter cake is carried out to remove liquid impurities from valuable solid product or to increase recovery of valuable filtrates from the cake. Wakeman (1990) has shown that the axial dispersion flow model, as developed in Sec. 4.3.6, provides a fundamental description of cake washing. It takes into account such situations as non-uniformities in the liquid flow pattern, non-uniform porosity distributions, the initial spread of washing liquid onto the topmost surface of the filter cake and the desorption of solute from the solid surfaces. [Pg.578]

A necessary assumption would also be that the initial porosity distribution remains constant and independent of flow rate. [Pg.582]

fully saturated permeable medium is known as a function of position, the spatially resolved porosity distribution can be determined. If the medium is saturated with two fluids, and the signal from one can be distinguished, the fluid saturation can be determined. In this section, we will develop a method to determine the amount of a single observed fluid using MRI, and demonstrate the determination of porosity. In Section 4.1.4.3, we will demonstrate the determination of saturation distributions for use in estimating multiphase flow functions. [Pg.364]

Fig. 4.1.4 Porosity distribution within a horizontal layer of the Bentheimer sample. Axis z- is parallel with the static magnetic field. |

Fig. 5.16 Mercury intrusion porosimetry curves of C3S pastes showing differences in capillary porosity distribution. |

Fig. 5.17 Porosity distribution curves at equal hydration with intruded volume plotted as a percentage of total intrusion (Young). |

Fig. 18. (a) Experimental and (b) theoretical time-averaged porosity distributions for a 2D air fluidized bed with a central jet. Physical properties of the particles diameter, 500 fim density, 2660 kg/m. Bed dimensions width, 0.57 m height, 1.0 m. Injection velocity through central orifice 10.0 m/s. [Pg.292]

Hg-injection curves give us the pore structures measurements such as mercury porosity, distribution of Hg-saturation versus pore-throat size specific surface area deduced from... [Pg.487]

AP-883kNm ) (b) Porosity distributions at three pressures. The curves are by Wakeman (1978). [Pg.318]

A) Pressure-controlled mercury porosimetry procedure. It consists of recording the injected mercury volume in the sample each time the pressure increases in order to obtain a quasi steady-state of the mercury level as P,+i-Pi >dP>0 where Pj+i, Pi are two successive experimental capillary pressure in the curve of pressure P versus volume V and dP is the pressure threshold being strictly positive. According to this protocol it is possible to calculate several petrophysical parameters of porous medium such as total porosity, distribution of pore-throat size, specific surface area and its distribution. Several authors estimate the permeability from mercury injection capillary pressure data. Thompson applied percolation theory to calculate permeability from mercury-injection data. [Pg.449]

See also in sourсe #XX -- [ Pg.534 ]

** Mat Porosity and Pore Size Distribution **

** Pore network modelling porosity distributions **

** Porosities and pore size distributions **

** Porosity and velocity distribution **

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