... predict the volume averaged flow properties (permeability and inertial coefficients) of the four structures. Specifically, the linear LBM (neglecting inertial forces) is first implemented to obtain the intrinsic permeability, and then the standard LBM is applied to obtain the inertial coefficient...

... to determine the permeability, k , from the pressure drop value for the plateau at low velocities, and the form drag term C , from the gradient of the linear section at higher velocities (using a water dynamic viscosity of 9.77 × 10 −4  Pa·s and density of 998 kg m −3 ). This approach was preferred to using...

... analytical solutions are proposed for both velocity distribution and permeability of the considered structures. In addition, independent numerical simulations are performed for the considered arrangements over the entire range of porosity and the results are compared with the proposed solutions...

... in a finite length tube which extends the study of Li and Brasseur (1993, “Non-Steady Peristaltic Transport in Finite-Length Tubes,” J. Fluid Mech., 248, pp. 129–151) . Boundary conditions are changed to include wall permeability. Analysis of pressure profile is described. From Eq. 19 , we have...

... permeability and Forchheimer coefficients, to be used in the standard unsteady volume-averaged momentum conservation equation for flow in porous media, were derived. It was found that the cycle-average permeability coefficients were nearly the same as those for steady flow, but the cycle-average Forchheimer...

... model, which does not require any prior microscopic numerical experiments for the structure. Hence, for the given permeability and Forchheimer coefficient, the model can be used for analyzing most complex turbulent flow situations in homogeneous porous media without a detailed morphological information...

... with the left wall maintained at 10 ° C and the right wall at 50 ° C . The molecular diffusion and thermal diffusion coefficients are functions of temperature, concentration, and viscosity of mixture components. It has been found that for permeability below 200 md the thermodiffusion is dominant; and above...

.... This results in a nonlinear, hysteretic, time-varying fluid property response to direct magnetic field excitation. Permeability, resistivity and permittivity changes of MR fluid were investigated and their suitability to indicate the organizational state of the fluid, and thus other transport properties...

...N. M. Brown; F. C. Lai Experiments have been conducted to measure the permeability and slip coefficient of seven porous tubes. They were made from fiberglass and nylon nettings with various wall thicknesses. Tests show that these tubes have a distinct permeability in the longitudinal and radial...

.... The compressed foam produced significantly higher pressure drop, which increased with increasing Darcian velocity following the quadratic Forchheimer equation. The permeability and the inertia coefficient data for the compressed foam showed less scatter compared to those for the uncompressed foam. Both were...

...L. Wilson; Arunn Narasimhan; S. P. Venkateshan Permeability ( K ) and form coefficient ( C ) are the characteristic hydraulic properties of any porous medium. They are determined simultaneously, for known fluid thermo-physical properties by using the Hazen-Dupuit-Darcy model (HDD) to curve-fit...

... of the preform varies during injection affecting permeability and fill time. First, a governing equation for VARTM is analytically developed from the fundamental continuity condition, and used to show the relation between parameters in VARTM. This analytical work is followed by the development of a numerical 1-D...

... computed, and the occurrence of cavitation was clearly identified. The results evidenced interesting differences in the permeability of both nozzle geometries and a clear resistance of the conical nozzle to cavitation. The valve is an electronically controlled solenoid-poppet valve whose purpose...

...K. Boomsma, ASME Member; D. Poulikakos, ASME Fellow Open-cell aluminum foams were investigated using water to determine their hydraulic characteristics. Maximum fluid flow velocities achieved were 1.042 m/s. The permeability and form coefficient varied from 2.46 × 10 − 10 m 2 and 8701 m − 1 to 3529...

... Division August 27, 1998; revised manuscript received April 26, 2000. Associate Technical Editor: M. Dhaubhadel. 27 August 1998 26 April 2000 flow through porous media filtration permeability history By taking the semivariogram of one set of Darcy’s experimental data...