Browsing NTNU Open by Author "Busch, Alexander"
Now showing items 1-10 of 10
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A 2D sediment bed morphodynamics model for turbulent, non-Newtonian, particle-loaded flows
Busch, Alexander; Khatibi, Milad; Johansen, Stein Tore; Time, Rune Wiggo (Chapter, 2017)In petroleum drilling, cuttings transport problems, i.e. an accumulation of drilled of solids in the wellbore, are a major contributor to well downtime and have therefore been extensively researched over the years, both ... -
Cuttings Transport Modeling - Part 1: Specification of Benchmark Parameters with a Norwegian Continental Shelf Perspective
Busch, Alexander; Islam, Aminul; Martins, Dwayne Werner; Iversen, Fionn; Khatibi, Milad; Johansen, Stein Tore; Time, Rune Wiggo; Meese, Ernst A. (Journal article; Peer reviewed, 2018)In oil and gas drilling, cuttings transport related problems are a major contributor to well downtime and costs. As a result, solutions to these problems have been extensively researched over the years, both experimentally ... -
Cuttings transport: On the effect of drill pipe rotation and lateral motion on the cuttings bed
Busch, Alexander; Johansen, Stein Tore (Peer reviewed; Journal article, 2020)Drill pipe rotation is considered a relevant factor for cuttings transport and hole cleaning. However, in the term “rotation” is often used as a moniker for the combination of plain drill pipe rotation around its own axis ... -
Judging the Generalized Newtonian Fluid assumption for cuttings transport modelling by applying time scale comparisons
Busch, Alexander; Johansen, Stein Tore (Chapter, 2018)Cellulose (PAC) solutions are often employed as drilling fluid model systems in experimental laboratory studies to investigate cuttings transport. For this purpose, PAC solutions are typically assumed to behave purely ... -
On particle transport and turbulence in wellbore flows of non-Newtonian fluids - Findings from a cuttings transport process analysis by means of computational fluid dynamics, rheometry, and dimensional analysis
Busch, Alexander (Doctoral theses at NTNU;2020:95, Doctoral thesis, 2020)Cuttings transport modeling was analyzed with a major focus on three dimensional (3D) Computational Fluid Dynamics (CFD) approaches including rheometry and to a lesser extent on one-dimensional modeling and dimensional ... -
On the validity of the two-fluid-KTGF approach for dense gravity-driven granular flows as implemented in ANSYS Fluent R17.2
Busch, Alexander; Johansen, Stein Tore (Peer reviewed; Journal article, 2020)As a subproblem of solid transport in wellbores, we have investigated the cliff collapse problem by means of the Two-Fluid-Model (TFM), where the rheological description of the second phase (sand) is governed by the Kinetic ... -
PhD budget regulations at NTNU
Busch, Alexander; Sripada, Kam; Verhulst, Elli (Research report, 2016)During 2015-2016, DION, the interest organization for doctoral candidates and postdoctoral researchers at NTNU, conducted an analysis of the various PhD budget (aka driftsmidler or working capital) related definitions, ... -
PhD duty work regulations at NTNU
Busch, Alexander; Sripada, Kam; Verhulst, Elli (Research report, 2016)During 2015-2016, DION, the interest organization for doctoral candidates and postdoctoral researchers at NTNU, conducted an analysis of the various PhD duty work (aka pliktarbeid, aka teaching load) related definitions, ... -
PhD working conditions at NTNU with a special focus on PhD candidates with kids
Busch, Alexander; Arbo, Mathias Hauan; Kasimba, Sam A.; Sripada, Kam (Research report, 2017)During 2016-2017, DION conducted an analysis of the PhD working conditions at NTNU, with special focus on PhDs with children. All NTNU PhD candidates were invited to respond to a survey regarding working conditions and ... -
Rheological characterization of Polyanionic Cellulose solutions with application to drilling fluids and cuttings transport modeling
Busch, Alexander; Myrseth, Velaug; Khatibi, Milad; Skjetne, Paal; Hovda, Sigve; Johansen, Stein Tore (Journal article; Peer reviewed, 2018)In petroleum drilling, aqueous Polyanionic Cellulose solutions (PAC) are often used as a drilling fluid model system in experimental laboratory studies to investigate cuttings transport. Cuttings transport refers to the ...