Výsledky vyhledávání - "Tadashi MASUYAMA"

Akademický článek

Flow Analysis and Approximate Expressions of Factors Related to Frictional Loss for Laminar Flow of Viscoplastic Fluids through a Concentric Annulus

Autor: Nobuo HATAKEYAMA, Yoshiyuki SHIMIZU, Tadashi MASUYAMA

Publikováno v: Journal of MMIJ, Vol 136, Iss 5, Pp 40-51 (2020)

The mud flow between the borehole and the drill pipe in well drilling can be regarded as the flow of nonNewtonian fluids through a concentric annulus. In recent years, the Herschel-Bulkley rheological model is recommended as a general fluid model of

Externí odkaz: https://doaj.org/article/09fab0711e784f5e8fa3e6d5a64c04db

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Akademický článek

Flow Characteristics of Slurry with Rare-Earth Rich Mud under Deep Seabed around Minamitorishima

Autor: Yoshiyuki SHIMIZU, Nobuo HATAKEYAMA, Eigo HANAMURA, Kazuo WATANABE, Yuka YOKOYAMA, Tadashi MASUYAMA

Publikováno v: Journal of MMIJ, Vol 135, Iss 7, Pp 52-62 (2019)

Flow characteristics of slurry with rare-earth rich mud are investigated to examine lifting systems for mining rare-earth elements from deep seabed. Twelve samples, extracted from different locations and depths from seabed around the Minamitorishima

Externí odkaz: https://doaj.org/article/7ed8b2420f39423b84e16b2c1c4e243d

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Akademický článek

Spreadsheet Solutions for Rheological Properties and Viscoplastic Fluid Flow in Circular Pipes and in Parallel-plates

Autor: Nobuo HATAKEYAMA, Yoshiyuki SHIMIZU, Tadashi MASUYAMA

Publikováno v: Journal of MMIJ, Vol 135, Iss 2, Pp 15-24 (2019)

The rheological properties of cement slurries (including fresh concrete and high concentration paste for filling etc.) are complicated, therefore they are approximated by the Bingham plastic model. In recent years, the application of Herschel-Bulkley

Externí odkaz: https://doaj.org/article/2de9832e6b0b4ae7a3d91c9bcfed339f

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Akademický článek

Numerical Analysis on Air-Lift Pumping System for Mining Rare-Earth Rich Mud

Autor: Yoshiyuki SHIMIZU, Nobuo HATAKEYAMA, Tadashi MASUYAMA

Publikováno v: Journal of MMIJ, Vol 134, Iss 10, Pp 142-150 (2018)

A numerical analysis is conducted to examine an air-lift pumping system for mining rare-earth rich mud under 6000m deep seabed around the Minami-Tori-Shima. The numerical scheme in the analysis adopts the one-dimensional drift-flux model, which solve

Externí odkaz: https://doaj.org/article/4bc17f6899c544968592f55ca5b98ac9

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Akademický článek

Constitutive Equations for a Simulator of Airlift Pump in a Large Diameter Pipe using Drift-Flux Model

Autor: Nobuo HATAKEYAMA, Yoshiyuki SHIMIZU, Tadashi MASUYAMA

Publikováno v: Journal of MMIJ, Vol 134, Iss 2, Pp 31-40 (2018)

One of the authors has developed a numerical simulator of airlift pump to solve governing equations represented by the drift flux model. The solver is based on the finite volume method which is known as SIMPLER algorithm for numerical scheme. The cal

Externí odkaz: https://doaj.org/article/81526065cdc94942a5e2e3c6c000aa0f

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Akademický článek

Pressure Drop and Determination of Characterizing Coefficients for Pseudoplastic Fluid Laminar Flow in Concentric Annuli

Autor: Nobuo HATAKEYAMA, Yoshiyuki SHIMIZU, Tadashi MASUYAMA

Publikováno v: Journal of MMIJ, Vol 133, Iss 7, Pp 157-164 (2017)

The flow through annuli is encountered in drilling operation, in which drilling mud flows between the borehole wall and the drilling pipe. Some drilling muds, depending on their prepared materials, exhibit nonNewtonian characteristics and in many cas

Externí odkaz: https://doaj.org/article/e95bf45ae4de42979df3b2fedda00c88

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