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Ranque-Hilsch vortex tube

Ranque-Hilsch vortex tube is a research topic within Mechanical Engineering. Science Explorer counts 2.9k research works in it since 1951. 10.2% of them reached the world's top 10% most cited for their field and year.

This cluster of papers focuses on the thermal separation phenomenon and energy efficiency in vortex tubes, particularly the Ranque-Hilsch effect. It includes experimental investigations, CFD analysis, and optimization studies related to nozzle design and exergy analysis. The research also explores the application of vortex tubes in energy efficiency and heat transfer processes.

  • Vortex Tube
  • Thermal Separation
  • CFD Analysis
  • Experimental Investigation
  • Energy Efficiency
  • Ranque-Hilsch Effect
  • Nozzle Design
  • Exergy Analysis
  • Counterflow Vortex Tube
  • Heat Transfer
Research works
2.9k
fractional, since 1951
In the world top 10%
295
per year above
Top-10% rate
10.2%
share of its works in the world top 10%
Growth, 2018-21 → 2022-25
-16%
the tick is no change
Largest producer
Russia
33% of the 10 largest, 2022-now
Ranque-Hilsch vortex tube

Which countries lead Ranque-Hilsch vortex tube research?

By volume, Russia and Ukraine publish the most (176 and 92 works in 2022-now).

By volume, 2022-now

  1. 1 Russia 176 works
  2. 2 Ukraine 92 works
  3. 3 China 82 works
  4. 4 India 48 works
  5. 5 Poland 38 works
  6. 6 Uzbekistan 29 works
  7. 7 United States 28 works
  8. 8 Türkiye 14 works
  9. 9 South Korea 14 works
  10. 10 Iran 13 works

How concentrated that is

The same countries as shares of everything the list above accounts for. A node where two countries do two thirds of the work and one spread evenly across twelve read alike as a ranking and not at all alike here.

Russia: 33.0%Ukraine: 17.3%China: 15.4%India: 9.0%6 others listed: 25.3%33%largest
Russia176 · 33.0%Ukraine92 · 17.3%China82 · 15.4%India48 · 9.0%6 others listed135 · 25.3%

Shares of the rows listed above, not of the whole node.

Which institutions lead Ranque-Hilsch vortex tube research?

By volume in 2022-now, Russian Academy of Sciences publishes the most Ranque-Hilsch vortex tube research, followed by National Academy of Sciences of Ukraine and Lviv Polytechnic National University.

By volume, 2022-now

  1. 1 Russian Academy of SciencesRussia 29 works
  2. 2 National Academy of Sciences of UkraineUkraine 18 works
  3. 3 Lviv Polytechnic National UniversityUkraine 12 works
  4. 4 Moscow State University of Civil EngineeringRussia 12 works
  5. 5 National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”Ukraine 8 works
  6. 6 Bauman Moscow State Technical UniversityRussia 8 works
  7. 7 National Institute of Technology DurgapurIndia 7 works
  8. 8 Kazan State Power Engineering UniversityRussia 7 works
  9. 9 Moscow Power Engineering InstituteRussia 6 works
  10. 10 China University of Petroleum, East ChinaChina 5 works

Who are the leading researchers in Ranque-Hilsch vortex tube?

The most-cited researchers publishing on Ranque-Hilsch vortex tube include R.Z. Wang and Kefa Cen.

  1. 1 R.Z. Wang China 61k citations
  2. 2 Kefa Cen China 56k citations

Ranked by citations received across their whole record, among researchers with at least three works on this topic.

What are the most cited papers in Ranque-Hilsch vortex tube?

The most cited paper in Ranque-Hilsch vortex tube is "Combustion aerodynamics" (Renate Günther, 1973), with 668 citations. Next come "Energy flexibility of residential buildings using short term heat storage in the thermal mass" (450) and "Parametric and internal study of the vortex tube using a CFD model" (269).

Most cited papers
#PaperReleasedCitations
1 Combustion aerodynamics Renate Günther · International Journal of Heat and Mass Transfer Feb 1973 668
2 Energy flexibility of residential buildings using short term heat storage in the thermal mass Jérôme Le Dréau, Per Heiselberg · Energy 22 Jun 2016 450
3 Parametric and internal study of the vortex tube using a CFD model Nawaf F. Aljuwayhel, Gregory Nellis, S.A. Klein · International Journal of Refrigeration 28 Dec 2004 269
4 Comparison of CFD analysis to empirical data in a commercial vortex tube Harrison M. Skye, Gregory Nellis, S.A. Klein · International Journal of Refrigeration 16 Aug 2005 261
5 Investigations of Machining Characteristics in the Upgraded MQL-Assisted Turning of Pure Titanium Alloys Using Evolutionary Algorithms Gurraj Singh, Catalin Iulian Pruncu, Munish Kumar Gupta et al. · Materials Open access 26 Mar 2019 255
All 100 most cited papers, with filters and sorting

Where is Ranque-Hilsch vortex tube research done?

The largest centres of Ranque-Hilsch vortex tube research in 2022-now are Moscow (Russia), Kyiv (Ukraine), Kazan’ (Russia) and Beijing (China). Among places with at least 20 works in it, it is an unusually large share of all research in Kazan’ and Kyiv.

Largest cities, 2022-now

  1. 1 MoscowRussia 53 works
  2. 2 KyivUkraine 35 works
  3. 3 Kazan’Russia 22 works
  4. 4 BeijingChina 15 works
  5. 5 NovosibirskRussia 15 works
  6. 6 LvivUkraine 12 works
  7. 7 KharkivUkraine 12 works
  8. 8 TashkentUzbekistan 11 works
  9. 9 OdesaUkraine 10 works
  10. 10 Saint PetersburgRussia 10 works

Where it is the local speciality

  1. Kazan’RU · 21.7 works48×
  2. KyivUA · 35.4 works19×
← less than its size predicts1×more →

Location quotient: how much more of its research is in Ranque-Hilsch vortex tube than the world average.

See Ranque-Hilsch vortex tube on the map

Where is the best place to study Ranque-Hilsch vortex tube?

Among universities, judged by research, Lviv Polytechnic National University and Moscow State University of Civil Engineering score highest, combining excellence, specialisation, size, growth and international reach. Research strength is one signal when choosing where to study; it does not measure teaching.

Excellenceshare of its work in the world top 10%, 2022-now and all time averaged
40%
Specialisationhow much of its work is in this field, counted up to 10× the world share
10%
Sizeits output in this field, on a log scale
30%
Growthoutput growth, counted from -20% to +20%
10%
Internationalshare of its work with a co-author abroad
10%
Each slider sets a weight; the share it gets of the score is beside it.
#UniversityScoreTop 10%SpecialisationWorksGrowth
1Lviv Polytechnic National UniversityUkraine 52.82.7%75.5×12 -9.0%
2Moscow State University of Civil EngineeringRussia 0.00.0%144.0×12 -20.4%

Universities only. The score blends excellence (40%), size (30%), specialisation (10%), growth (10%), international reach (10%), 2022-now; growth compares 2018-21 with 2022-25 and counts up to +20%, since a jump from a small base is mostly noise.

Every institution in Ranque-Hilsch vortex tube, country by country

Is Ranque-Hilsch vortex tube research growing?

Output in 2022-2025 was 16% lower than in 2018-2021, peaking in 2020.

still counting19801990200020102020
grewheldshrank

The same series as a ribbon: one cell per year, darker for more. The line above answers how much; this answers when.

Its share of all research

Growing output can still be a shrinking share: all of science grows. This is Ranque-Hilsch vortex tube as a percentage of every work published that year, 0.0026% in 2024.

still counting0.0020%0.0040%0.0060%Ranque-Hilsch vortex tube0.0025% in 202519801990200020102020

Fractional works of Ranque-Hilsch vortex tube over all fractional works that year. How the balance of science has shifted.

How much of it reaches the world top 10%

Year by year.

still counting5%10%15%Ranque-Hilsch vortex tube10.7% in 202520102020

Of each year's works in it, the share that reached the world's 10% most cited for their field and year. A field is the world for its own topics, so there is no other line to hold it against.

Which topics inside it are moving

Growth and decline on one axis around a shared zero. Two lists side by side hide the thing that matters: whether the growth dwarfs the decline, or the other way round.

Discussion

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