Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 8 of 8 for “"flow resistivity"”.
-
A superconducting memory switch based on the principles of flux-flow resistivity
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Physics, 1989.
-
The exploitation of acoustic-to-seismic coupling for the determination of soil properties
… measurements of the Type-II wave allowed the flow resistivity and tortuosity of the material to be determined using a rigid frame model, whilst deduction of elastic moduli has been made from signals received at buried geophones. It has been shown that microphone signals include Type-I P-wave …
-
Acoustic metamaterials comprised of dead-end pores and black hole effect for low frequency sound absorption in linear and nonlinear regimes
… performance.To investigate the nonlinear regime, flow resistivity measurements are performed on the samples to directly measure Forchheimer’s nonlinearity parameter. Flow resistivity measurements at low flow rates show that the periodic set of cavities does not modify resistivity significantly …
-
Behavior of low-frequency sound waves in porous media
… considered include porosity, tortuosity, and flow resistivity.
-
Acoustical characteristics of oil palm mesocarp fibres
… of the prepared samples investigated namely flow resistivity, porosity, tortuosity, characteristic lengths, fibre diameter, air gaps and thickness of sample. The flow resistivity, tortuosity, fibre diameter, density of samples and characteristic lengths tend to increase with percentage of PU …
-
Modelling and experimental studies of the magnetic properties of bulk high temperature superconductors
… Kim model) and E-J characteristics (the flux flow resistivity model and the power law model). Chapter 2 relates the properties of bulk superconductors, and especially those relating Jc, to the major research areas within bulk superconductivity of fabrication, magnetisation and modelling. …
-
Sound absorption performance of EFBMF panel for building acoustic material
… inside the material to reduced and leads to high flow resistivity. This will results in higher sound energy to be converted to heat and resulting in higher absorption. Absorption performance of EFBMF panel achieved 0.58 coefficients with optimum thickness, bulk density and apparent porosity value …
-
Acoustic and Thermal Properties of Recycled Porous Media
… change in the pore size distribution, porosity, flow resistivity and tortuosity which vary as a function of sample depth. It is shown that the Pade approximation is a suitable model to study the acoustic behaviour of these materials. A good agreement between the measured data and the model was …