Summary
Fluid mechanics and thermal engineering concern the behaviour of liquids and gases in motion and the management of thermal energy within those flows. Central to fluid mechanics are the conservation laws—mass, momentum and energy—which, together with material constitutive relations, describe phenomena as varied as laminar shear layers, turbulent boundary layers and supersonic jet dynamics. Thermal engineering overlaps at points of heat exchange and phase change, from convective transfer in heat exchangers and microchannels to nucleate boiling on engineered surfaces. Applications span energy production, electronics cooling, transportation and process industries. Advances in experimental diagnostics (particle‐image velocimetry, laser‐based thermometry), high‐fidelity simulation (direct numerical, large eddy, immersed‐boundary and fluid–structure‐interaction methods) and data‐driven modelling are transforming our capacity to predict and optimise coupled flow–thermal processes across scales, enabling more efficient power plants, quieter aeroengines, compact electronics coolers and novel energy‐conversion devices.
Research from Nature Portfolio
A mesoscale fluctuating‐hydrodynamics model has shed new light on boiling and cavitation by capturing stochastic nucleation through to bubble growth and collapse. Coupling diffuse‐interface methods with thermal noise, the study quantified how nanoscale wettability heterogeneities dramatically lower the superheat needed for nucleation, offering a predictive framework for surface‐engineered boiling systems.
In heat‐exchanger design, an experimental and numerical investigation of an inclined channel fitted with spring turbulators demonstrated up to two‐fold gains in local convective heat‐transfer coefficients in the transition‐to‐turbulence regime, alongside quantified friction‐factor penalties. The findings underpin correlations for compact heat‐exchangers operating under mixed‐convection conditions.
An experimental study of U‐bend double‐pipe heat exchangers using MgO–carboxymethyl cellulose hybrid nanofluids revealed a 35 per cent enhancement in overall convective heat‐transfer coefficient over water–surfactant baselines. By optimising nanoparticle concentration and stabiliser fraction, the work identified conditions that minimise fouling while maximising thermal performance in curved geometries.
Topic trend for the past 5 years
The graph below shows the article count in Nature Index journals for fluid mechanics and thermal engineering.
* The ‘Current Index’ represents data for a 12-month rolling window, the current window is 1 May 2025 - 30 April 2026.
Technical terms
Boundary layer: Thin region adjacent to a solid surface in which viscous and thermal diffusion dominate and velocity and temperature rise from wall values to free-stream levels.
Nusselt number: Dimensionless heat‐transfer coefficient defined as the ratio of convective to conductive heat transport across a boundary layer or heat‐exchanger surface.
Nanofluid: Suspension of nanoparticles (1–100 nm) in a base fluid engineered to enhance thermal conductivity and convective heat‐transfer performance.
Boiling onset: The temperature at which a liquid first exhibits nucleate boiling under given pressure and surface conditions, marking the initiation of vapour bubble formation.
Darcy–Bénard convection: Buoyancy‐driven flow in a fluid‐saturated porous medium governed by Darcy’s law and the Darcy–Rayleigh number, leading to convective instabilities.
Jet screech: Tonal acoustic feedback in supersonic jets resulting from interactions between instability wavepackets and periodic shock–cell structures.
Notable articles in fluid mechanics and thermal engineering
- Co-designing electronics with microfluidics for more sustainable cooling. Nature (2020).
- Critical heat flux maxima during boiling crisis on textured surfaces. Nature Communications (2015).
- Rotational manipulation of single cells and organisms using acoustic waves. Nature Communications (2016).
- Holographic acoustic elements for manipulation of levitated objects. Nature Communications (2015).
- Identification of single nucleotides in MoS2 nanopores. Nature Nanotechnology (2015).
About these summaries
This Nature Research Intelligence Topic summary is created with the cited references and a large language model. We take care to ground generated text with facts, and have systems in place to gain human feedback on the overall quality of the process in line with our AI principles. We strive to create accurate and useful summaries for people unfamiliar with the research topic and that supports this goal. These pages are a beta release and will be updated as we learn how best to help people gain value from a research topic summary.
Research
Position of Fluid Mechanics and Thermal Engineering in Nature Index by Count
Leading institutions
| Institution | Count | Share |
|---|---|---|
| Jiangsu University (JSU) | 18 | 13.1 |
| Chinese Academy of Sciences (CAS) | 40 | 10.91 |
| Tsinghua University | 27 | 10.34 |
| Harbin Institute of Technology (HIT) | 12 | 8.52 |
| Xi'an Jiaotong University (XJTU) | 12 | 8.09 |
| Yangzhou University (YZU) | 11 | 7.73 |
| Zhejiang University (ZJU) | 12 | 7.61 |
| Nanjing University (NJU) | 11 | 7.56 |
| Shandong University (SDU) | 11 | 7.04 |
| Northwestern Polytechnical University (NPU) | 12 | 7.04 |
Leading countries/territories
| Countries/territories | Count | Share |
|---|---|---|
| China | 326 | 296.45 |
| United States of America (USA) | 108 | 70.38 |
| United Kingdom (UK) | 40 | 18.73 |
| Japan | 30 | 17.76 |
| Germany | 36 | 17.39 |
| France | 27 | 14.47 |
| Poland | 17 | 12.57 |
| India | 15 | 11.09 |
| Netherlands | 18 | 11.03 |
| South Korea | 12 | 8.21 |
Collaboration
Top 5 leading collaborators in Fluid Mechanics and Thermal Engineering
Collaborating institutions
Note: Hover over the bars to view details about each institution's Share.
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