Youhei Sasaki

ORCID: 0000-0002-6190-3874
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About
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Research Areas
  • Geomagnetism and Paleomagnetism Studies
  • Solar and Space Plasma Dynamics
  • Geological and Geochemical Analysis
  • Characterization and Applications of Magnetic Nanoparticles
  • Fluid Dynamics and Turbulent Flows
  • High-pressure geophysics and materials
  • Geology and Paleoclimatology Research
  • Distributed and Parallel Computing Systems
  • Geophysics and Gravity Measurements
  • Fluid dynamics and aerodynamics studies
  • Aeolian processes and effects
  • Tribology and Lubrication Engineering
  • Scientific Computing and Data Management
  • Meteorological Phenomena and Simulations
  • Magnetic and Electromagnetic Effects
  • Influenza Virus Research Studies
  • Astro and Planetary Science
  • Hydrocarbon exploration and reservoir analysis
  • Viral Infections and Vectors
  • Plant nutrient uptake and metabolism
  • Geological Modeling and Analysis
  • Reservoir Engineering and Simulation Methods
  • Plant Molecular Biology Research
  • earthquake and tectonic studies
  • Global Energy and Sustainability Research

Hokkaido Information University
2023-2024

Setsunan University
2021

Showa University
2020

Kyoto University
2011-2018

Numerical simulations of the geodynamo have successfully represented many observable characteristics geomagnetic field, yielding insight into fundamental processes that generate magnetic fields in Earth's core. Because limited spatial resolution, however, diffusivities numerical dynamo models are much larger than those core, and consequently, questions remain about how realistic these are. The typical strategy used to address this issue has been continue increase resolution quasi-laminar...

10.1002/2015gc006159 article EN publisher-specific-oa Geochemistry Geophysics Geosystems 2016-02-12

Convection in planetary cores can generate fluid flow and magnetic fields, a number of sophisticated codes exist to simulate the dynamic behaviour such systems. We report on first community activity compare numerical results computer designed calculate within whole sphere. The flows are incompressible rapidly rotating forcing is either due thermal convection or moving boundaries. All problems defined have solutions that allow easy comparison, since they steady, slowly drifting perfectly...

10.1093/gji/ggt518 article EN Geophysical Journal International 2014-01-25

It is frequently considered that many planetary magnetic fields originate as a result of convection within cores. Buoyancy forces responsible for driving the generate fluid flow able to induce fields; numerous sophisticated computer codes are simulate dynamic behaviour such systems. This paper reports results community activity aimed at comparing numerical several different types capable solving equations momentum transfer, field generation and heat transfer in setting spherical shell,...

10.1093/gji/ggt425 article EN Geophysical Journal International 2013-11-21

In many plants, timing of flowering is regulated by day length. Arabidopsis, florigen, FLOWERING LOCUS T (FT) protein, synthesized in leaf phloem companion cells response to long days and transported the shoot apical meristem (SAM) through phloem. The temporal aspects florigen transportation have been studied various plants physiological experiments. Nevertheless, little known about how FT protein Arabidopsis. this study, we performed heat shock-based transient induction a single blade...

10.1093/pcp/pcy063 article EN Plant and Cell Physiology 2018-03-17

Abstract. A Fortran90 input/output library, "gtool5", is developed for use with numerical simulation models in the fields of Earth and planetary sciences. The this library will simplify implementation operations into program code a consolidated form independent size complexity software data. also enables simple specification metadata needed post-processing visualization These aspects improve readability code, which facilitates simultaneous performance multiple experiments different...

10.5194/gmd-5-449-2012 article EN cc-by Geoscientific model development 2012-04-03

We discuss destruction of a thermally stable layer in the upper part Earth's outer core by compositional convection excited at inner boundary. propose to use radial distribution power induced thermal and buoyancy (rate kinetic energy production) as measure occurrence convection. The consists terms proportional convective entropy flux flux. In region with positive power, is active because can be produced force, stably stratified could not formed there. On other hand, negative suppressed may...

10.3389/feart.2018.00192 article EN cc-by Frontiers in Earth Science 2018-11-02

The asymptotic behavior of the profiles mean zonal flows generated by thermal convection a Boussinesq fluid in rapidly rotating thin spherical shell was studied extending integration time numerical experiments previous study under similar conditions. Calculations were performed for whole globe, as well one-eighth sector region, with various values hyper-diffusion parameters. For sufficiently weak hyper-diffusion, prograde jet and alternating narrow jets appeared at equator middle high...

10.1016/j.icarus.2024.116154 article EN cc-by Icarus 2024-05-27

Abstract. A Fortran90 input/output library, "gtool5", is developed for use with numerical simulation models in the fields of Earth and planetary sciences. The this library will simplify implementation operations into program code a consolidated form independent size complexity software data. also enables simple specification metadata needed post-processing visualization These aspects improve readability code, which facilitates simultaneous performance multiple experiments different...

10.5194/gmdd-4-3691-2011 preprint EN cc-by 2011-12-19
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