Permeability

In recent years, the prediction of the effective transport properties have received a great number of investigations. The present work is dedicated to determining the effective permeability of two-dimensional (2D) doubly porous materials made of an isotropic permeable solid matrix in which elliptical shaped pores of any size are embedded. At the interface between the fluid and the solid, the Beaver–Joseph–Saffman conditions are applied.

10p vithomson 02-07-2024 0 0   Download

Part 1 book "Geotechnical engineering - Principles and practices of soil mechanics and foundation engineering" includes content: Introduction, soil formation and characterization, soil phase relationships, index properties and classification, soil permeability and seepage, effective stress and pore water pressure, stress distribution in soils due to surface loads, compressibility and consolidation, shear strength of soil, soil exploration, stability of slopes, lateral earth pressure.

499p dianmotminh04 12-07-2024 0 0   Download

Part 1 of ebook "Engineering rock mechanics - Part 2: Illustrative worked examples" provides readers with contents including: Chapter 1 - Introduction; Chapter 2 - Geological setting; Chapter 3 - Stress; Chapter 4 - In situ rock stress; Chapter 5 - Strain and the theory of elasticity; Chapter 6 - Intact rock, deformability, strength and failure; Chapter 7 - Fractures and hemispherical projection; Chapter 8 - Rock masses, deformability, strength and failure; Chapter 9 - Permeability;...

233p giangdongdinh 28-05-2024 4 2   Download

Part 2 book "Engineering electrodynamics - Electric machine, transformer, and power equipment design" includes content: Magnetic fields near iron surfaces, electromagnetic phenomena in metals with constant permeability, electromagnetic phenomena in ferromagnetic bodies, forces in electrodynamic systems, local heating of structural parts, methods of experimental investigations, conclusion.

295p dianmotminh01 20-05-2024 2 1   Download

Lecture Petroleum production engineering - Chapter 1.2: Rock and reservoir fluid properties. This lesson provides students with content about: porosity and density; saturation; permeability; capillary pressure; wettability; reservoir pressure; reservoir temperature;... Please refer to the detailed content of the lecture!

32p mothuahoa 04-05-2024 0 0   Download

Lecture Reservoir engineering - Chapter 2: Reservoir rock properties. This chapter provides students with content about: reservoir; porosity; pore-space classification; comparison of total and effective porosities; permeability; absolute permeability; effective permeability; saturation;... Please refer to the detailed content of the lecture!

66p mothuahoa 04-05-2024 3 0   Download

Ebook "Mitochondria and cell death" examines the role of mitochondria in different types of cell death, including apoptotic and necrotic cell deaths. Topics discussed include mitochondrial outer membrane permeabilization (MOMP) and the permeability transition pore; core processes such as calcium handling, fission and fusion, reactive oxygen species generation, and maintenance of mitochondrial DNA fidelity and protein folding homeostasis; and retrograde signaling between mitochondria and other cellular components, including the important role of mitochondria in antiviral immunity.

242p tracanhphuonghoa1007 22-04-2024 2 2   Download

The maritime sector is crucial for socioeconomic development and safeguarding the internal security and defense of the country. Ecosystems may be harmed by dredging and ship activities at ports. Services at seaports for transporting passengers and cargo are believed to be responsible for releasing approximately 20% of worldwide waste into the sea.

8p viohoyo 25-04-2024 5 2   Download

Ebook "Creation of new metal nanoparticles and their hydrogen-storage and catalytic properties" reports the discovery of metal nanoparticles having new structures that do not exist in bulk state and that exhibit hydrogen storage ability or CO oxidation activity. Research into the reaction of hydrogen with metals has attracted much attention because of potential applications as effective hydrogen storage materials, as permeable films, or as catalysts for hydrogenation.

86p tudohanhtau1006 29-03-2024 5 1   Download

Ebook "Cement and concrete chemistry" describes cement clinker formation. It covers multicomponent systems, clinker phase structures and their reactions with water, hydrate composition and structure, as well as their physical properties. The mineral additions to cement are described as are their influence on cement-paste properties. Special cements are also discussed.

705p nhanphanguyet 28-01-2024 10 2   Download

Part 1 book "Neuroscience" includes content: Electrical signals of nerve cells; voltage dependent membrane permeability; channels and transporters; synaptic transmission; neurotransmitters and their receptors; molecular signaling within neurons; synaptic plasticity; the somatic sensory system - touch and proprioception; pain, vision - the eye; central visual pathways.

338p muasambanhan03 02-01-2024 4 2   Download

Ebook "Traumatic and ischemic injury: Methods and protocols" focuses on procedures for the development and application of several research animal models and in vitro methods that allow researchers to gain insight into the underlying cellular, biochemical, and physiological mechanisms involved in traumatic and ischemic injury.

243p lamquandat 28-12-2023 8 2   Download

Ebook "Oxygen transport to tissue XXXIX" presents all aspects of delivery of oxygen to tissues and tumors in peer reviewed short articles. Both overview and the most recent, advanced techniques for oxygen measurement are presented. Articles and peer reviewers include those from leaders in their field.

427p lucchinguyen 28-12-2023 4 2   Download

In conclusion, the geotechnical properties of the unhydrated sand-mixed GBFS become more advantageous than those of natural sand. In addition, by mixing with natural sand, the hydration reaction rate and the solidification of GBFS are controlled. This means that it is possible to keep the compressive strength and the permeability at the predetermined conditions and, in turn, to satisfy requirements for the SCP method with LSRAR.

21p vialfrednobel 21-12-2023 3 2   Download

"Standard Test Methods for Permeability of Weakly Magnetic Materials" cover four procedures for determination of the permeability [relative permeability]2 of materials having a permeability not exceeding 6.0. Materials typically tested by these methods such as austenitic stainless steels may be weakly ferromagnetic. That is, the magnetic permeability is dependent on the magnetic field strength.

8p hth_hn_vn 10-12-2023 6 4   Download

"Standard Test Method for Alternating-Current Magnetic Properties of Materials at Power Frequencies Using Wattmeter-Ammeter-Voltmeter Method and 25-cm Epstein Test Frame" covers tests for the magnetic properties of basic flat-rolled magnetic materials at power frequencies (25 to 400 Hz) using a 25-cm Epstein test frame and the 25-cm double-lap-jointed core. It covers the determination of core loss, rms exciting power, rms and peak exciting current, and several types of ac permeability and related properties of flat-rolled magnetic materials under ac magnetization.

17p hth_hn_vn 10-12-2023 10 4   Download

"Standard Test Method for Alternating Current Magnetic Properties of Materials Using the Wattmeter-Ammeter-Voltmeter Method, 100 to 10 000 Hz and 25-cm Epstein Frame" covers the determination of the magnetic properties of flat-rolled magnetic materials using Epstein test specimens with double-lap joints in the 25-cm Epstein frame. It covers determination of core loss, rms and peak exciting current, exciting power, magnetic field strength, and permeability.

11p hth_hn_vn 10-12-2023 6 4   Download

This specification covers the detailed requirements to which flat-rolled nonoriented fully processed electrical steel shall conform. This steel is produced to specified maximum core-loss values and is intended primarily for commercial power frequency (50 and 60 Hz) applications in magnetic devices. Desirable core-loss and permeability characteristics are developed during mill processing, so additional heat treatment by the user is usually not necessary

6p hth_hn_vn 10-12-2023 6 4   Download

This specification covers the detailed requirements to which flat-rolled, nonoriented semiprocessed electrical steel shall conform. This steel is produced to specified maximum core-loss values and is intended primarily for commercial power frequency (50 and 60 Hz) applications in magnetic devices. Desirable core-loss and permeability characteristics are developed through heat treatment by the user.

6p hth_hn_vn 10-12-2023 7 4   Download

This test method covers the determination of several ac magnetic properties of laminated cores made from flat-rolled magnetic materials. This test method covers test equipment and procedures for the determination of impedance permeability and exciting power from voltage and current measurements, and core loss from wattmeter measurements. These tests are made under conditions of sinusoidal flux.

11p hth_hn_vn 10-12-2023 12 5   Download