World's Best Scientists 2026 revealed!
Yoshiaki Oka

Yoshiaki Oka

D-Index & Metrics

Mechanical and Aerospace Engineering

D-Index
43
Citations
10918
World Ranking
1683
National Ranking
35

Yoshiaki Oka publication distribution in Mechanical and Aerospace Engineering in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Mechanical and Aerospace Engineering in 2026. The highlighted bar marks where Yoshiaki Oka sits on this spectrum.

47–56 publications: 10 scientists 57–66 publications: 23 scientists 67–76 publications: 32 scientists 77–86 publications: 62 scientists 87–96 publications: 67 scientists 97–106 publications: 91 scientists 107–116 publications: 113 scientists 117–126 publications: 115 scientists 127–136 publications: 130 scientists 137–146 publications: 140 scientists 147–156 publications: 155 scientists 157–166 publications: 132 scientists 167–176 publications: 133 scientists 177–186 publications: 130 scientists 187–196 publications: 140 scientists 197–206 publications: 115 scientists 207–216 publications: 125 scientists 217–226 publications: 117 scientists 227–236 publications: 99 scientists 237–246 publications: 92 scientists 247–256 publications: 100 scientists 257–266 publications: 95 scientists 267–276 publications: 88 scientists 277–286 publications: 77 scientists 287–296 publications: 74 scientists 297–306 publications: 74 scientists 307–316 publications: 62 scientists 317–326 publications: 70 scientists 327–336 publications: 59 scientists 337–346 publications: 58 scientists 347–356 publications: 45 scientists 357–366 publications: 44 scientists 367–376 publications: 36 scientists 377–386 publications: 41 scientists 387–396 publications: 32 scientists 397–406 publications: 23 scientists 407–416 publications: 28 scientists 417–426 publications: 27 scientists 427–436 publications: 25 scientists 437–446 publications: 23 scientists 447–456 publications: 23 scientists 457–466 publications: 20 scientists 467–476 publications: 12 scientists 477–486 publications: 24 scientists 487–496 publications: 18 scientists 497–506 publications: 12 scientists 507–516 publications: 13 scientists 517–526 publications: 21 scientists 527–536 publications: 12 scientists 537–546 publications: 8 scientists 547–556 publications: 16 scientists 557–566 publications: 3 scientists 567–576 publications: 11 scientists 577–586 publications: 6 scientists 587–596 publications: 5 scientists 597–606 publications: 6 scientists 607–616 publications: 7 scientists 617–626 publications: 7 scientists 627–636 publications: 10 scientists 637–646 publications: 4 scientists 647–656 publications: 3 scientists 657–658 publications: 2 scientists 659+ publications: 100 scientists
47 publications 659+

This scientist: 298 publications — 72nd percentile

72% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 659 publications or more.

Yoshiaki Oka D-index placement in Mechanical and Aerospace Engineering in 2026

The chart shows the D-index (discipline H-index) distribution of Mechanical and Aerospace Engineering scientists ranked by Research.com in 2026. The highlighted bar marks where Yoshiaki Oka sits on this spectrum.

30 D-Index: 83 scientists 31 D-Index: 113 scientists 32 D-Index: 144 scientists 33 D-Index: 153 scientists 34 D-Index: 189 scientists 35 D-Index: 158 scientists 36 D-Index: 139 scientists 37 D-Index: 127 scientists 38 D-Index: 130 scientists 39 D-Index: 126 scientists 40 D-Index: 104 scientists 41 D-Index: 100 scientists 42 D-Index: 107 scientists 43 D-Index: 101 scientists 44 D-Index: 103 scientists 45 D-Index: 79 scientists 46 D-Index: 88 scientists 47 D-Index: 70 scientists 48 D-Index: 83 scientists 49 D-Index: 44 scientists 50 D-Index: 64 scientists 51 D-Index: 56 scientists 52 D-Index: 50 scientists 53 D-Index: 48 scientists 54 D-Index: 58 scientists 55 D-Index: 52 scientists 56 D-Index: 48 scientists 57 D-Index: 42 scientists 58 D-Index: 34 scientists 59 D-Index: 42 scientists 60 D-Index: 37 scientists 61 D-Index: 42 scientists 62 D-Index: 44 scientists 63 D-Index: 22 scientists 64 D-Index: 33 scientists 65 D-Index: 29 scientists 66 D-Index: 23 scientists 67 D-Index: 29 scientists 68 D-Index: 24 scientists 69 D-Index: 19 scientists 70 D-Index: 34 scientists 71 D-Index: 26 scientists 72 D-Index: 19 scientists 73 D-Index: 18 scientists 74 D-Index: 19 scientists 75 D-Index: 14 scientists 76 D-Index: 19 scientists 77 D-Index: 8 scientists 78 D-Index: 18 scientists 79 D-Index: 16 scientists 80 D-Index: 12 scientists 81 D-Index: 17 scientists 82 D-Index: 11 scientists 83 D-Index: 16 scientists 84 D-Index: 7 scientists 85 D-Index: 9 scientists 86 D-Index: 8 scientists 87 D-Index: 6 scientists 88 D-Index: 6 scientists 89 D-Index: 7 scientists 90 D-Index: 10 scientists 91 D-Index: 4 scientists 92 D-Index: 4 scientists 93+ D-Index: 100 scientists
30 D-Index 93+

This scientist: 43 D-Index — 51st percentile

51% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 93 D-Index or more.

Overview

What is he best known for?

The fields of study he is best known for:

  • Thermodynamics
  • Mechanics
  • Mechanical engineering

His primary areas of study are Mechanics, Nuclear engineering, Coolant, Classical mechanics and Supercritical fluid. His research investigates the connection between Mechanics and topics such as Numerical analysis that intersect with issues in Beam. His research in the fields of Reactor pressure vessel, Nuclear reactor and Nuclear reactor core overlaps with other disciplines such as Thermal efficiency.

The various areas that Yoshiaki Oka examines in his Coolant study include Body orifice and Thermal hydraulics. His Classical mechanics research is multidisciplinary, incorporating elements of Particle, Compressibility, Partial differential equation and Surface tension. His Supercritical fluid research is multidisciplinary, relying on both Heat transfer and Water cooled.

His most cited work include:

  • Moving-Particle Semi-Implicit Method for Fragmentation of Incompressible Fluid (1236 citations)
  • NUMERICAL ANALYSIS OF BREAKING WAVES USING THE MOVING PARTICLE SEMI-IMPLICIT METHOD (595 citations)
  • Numerical analysis of deterioration phenomena in heat transfer to supercritical water (198 citations)

What are the main themes of his work throughout his whole career to date?

His scientific interests lie mostly in Nuclear engineering, Mechanics, Coolant, Supercritical fluid and Nuclear reactor. His work on Light-water reactor, Reactor pressure vessel and Nuclear reactor core as part of general Nuclear engineering research is often related to Thermal efficiency, thus linking different fields of science. His Mechanics research incorporates elements of Particle, Numerical analysis and Classical mechanics.

His Classical mechanics study frequently involves adjacent topics like Compressibility. The concepts of his Coolant study are interwoven with issues in Control rod and Thermal hydraulics. His Supercritical fluid research focuses on subjects like Cabin pressurization, which are linked to Boiler feedwater.

He most often published in these fields:

  • Nuclear engineering (47.92%)
  • Mechanics (27.78%)
  • Coolant (28.12%)

What were the highlights of his more recent work (between 2010-2015)?

  • Nuclear engineering (47.92%)
  • Coolant (28.12%)
  • Mechanics (27.78%)

In recent papers he was focusing on the following fields of study:

His primary areas of investigation include Nuclear engineering, Coolant, Mechanics, Supercritical fluid and Core. His Nuclear engineering research incorporates themes from Control rod and Volumetric flow rate. His Coolant study incorporates themes from Void, Reactor pressure vessel, Flow, MOX fuel and Blanket.

Yoshiaki Oka combines subjects such as Thermal, Numerical analysis and Classical mechanics with his study of Mechanics. In his study, Penetration is strongly linked to Phase transition, which falls under the umbrella field of Numerical analysis. His work deals with themes such as Mechanical engineering and Water cooled, which intersect with Supercritical fluid.

Between 2010 and 2015, his most popular works were:

  • Numerical investigation on coalescence of bubble pairs rising in a stagnant liquid (70 citations)
  • Numerical investigation of grid spacer effect on heat transfer of supercritical water flows in a tight rod bundle (35 citations)
  • Nuclear Reactor Design (31 citations)

In his most recent research, the most cited papers focused on:

  • Thermodynamics
  • Mechanics
  • Mechanical engineering

Yoshiaki Oka mainly focuses on Nuclear engineering, Coolant, Supercritical fluid, Mechanics and Nuclear reactor. The Nuclear engineering study combines topics in areas such as Cabin pressurization and Pressure vessel. His research integrates issues of Water cooled, Fuel element failure and MOX fuel in his study of Coolant.

His studies deal with areas such as Bundle, Thermal conduction and Numerical analysis as well as Mechanics. As a part of the same scientific family, Yoshiaki Oka mostly works in the field of Numerical analysis, focusing on Uranium dioxide and, on occasion, Phase transition and Penetration. His Free surface research integrates issues from Particle, Mass flux, Compressibility, Viscosity and Core catcher.

Best Publications

  • Moving-Particle Semi-Implicit Method for Fragmentation of Incompressible Fluid

    S. Koshizuka;Y. Oka

  • NUMERICAL ANALYSIS OF BREAKING WAVES USING THE MOVING PARTICLE SEMI-IMPLICIT METHOD

    Seiichi Koshizuka;Atsushi Nobe;Yoshiaki Oka

  • Numerical analysis of deterioration phenomena in heat transfer to supercritical water

    S. Koshizuka;N. Takano;Y. Oka

  • Numerical Analysis of Jet Breakup Behavior Using Particle Method

    Katsuya Nomura;Seiichi Koshizuka;Yoshiaki Oka;Hiroyuki Obata

  • Direct calculation of bubble growth, departure, and rise in nucleate pool boiling

    Han Young Yoon;Seiichi Koshizuka;Yoshiaki Oka

  • Numerical investigation of heat transfer in upward flows of supercritical water in circular tubes and tight fuel rod bundles

    Jue Yang;Yoshiaki Oka;Yuki Ishiwatari;Jie Liu

  • Super Light Water Reactors and Super Fast Reactors: Supercritical-Pressure Light Water Cooled Reactors

    Yoshiaki Oka;Seiichi Koshizuka;Yuki Ishiwatari;Akifumi Yamaji

  • High performance light water reactor

    D. Squarer;T. Schulenberg;D. Struwe;Y. Oka

  • A hybrid particle-mesh method for viscous, incompressible, multiphase flows

    Jie Liu;Seiichi Koshizuka;Yoshiaki Oka

  • Numerical analysis of fragmentation mechanisms in vapor explosions

    Seiichi Koshizuka;Hirokazu Ikeda;Yoshiaki Oka

  • Design concept of once-through cycle supercritical-pressure light water cooled reactors

    Y. Oka

  • Numerical investigation on coalescence of bubble pairs rising in a stagnant liquid

    R.H. Chen;W.X. Tian;W.X. Tian;G.H. Su;S.Z. Qiu

  • Conceptual design of a high temperature power reactor cooled and moderated by supercritical light water

    K. Dobashi;A. Kimura;Y. Oka;S. Koshizuka

  • A particle-gridless hybrid method for incompressible flows

    Han Young Yoon;Seiichi Koshizuka;Yoshiaki Oka

  • Supercritical-pressure, Once-through Cycle Light Water Cooled Reactor Concept

    Yoshiaki Oka;Seiichi Koshizuka

  • Numerical Analysis of Jet Injection Behavior for Fuel-Coolant Interaction using Particle Method

    Hirokazu Ikeda;Seiichi Koshizuka;Yoshiaki Oka;Hyun Sun Park

  • A particle method for calculating splashing of incompressible viscous fluid

    Seiichi Koshizuka;Yoshiaki Oka;Hiroaki Tamako

  • Nuclear Reactor Design

    Yoshiaki Oka

  • Numerical computation of thermally controlled steam bubble condensation using Moving Particle Semi-implicit (MPS) method

    Wenxi Tian;Wenxi Tian;Yuki Ishiwatari;Satoshi Ikejiri;Masanori Yamakawa

  • Refinement of Transient Criteria and Safety Analysis for a High-Temperature Reactor Cooled by Supercritical Water

    Kazuaki Kitoh;Seiichi Koshizuka;Yoshiaki Oka

  • A linear stability analysis of supercritical water reactors, (I) thermal-hydraulic stability

    Tin Tin Yi;Seiichi Koshizuka;Yoshiaki Oka

Frequent Co-Authors

Seiichi Koshizuka
Seiichi Koshizuka University of Tokyo
Guanghui Su
Guanghui Su Xi'an Jiaotong University
Suizheng Qiu
Suizheng Qiu Xi'an Jiaotong University
Daotong Chong
Daotong Chong Xi'an Jiaotong University

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