Turbulent Jet Flow Dynamics and Heat Transfer
Summary
Turbulent jet flows arise when a high-velocity fluid issues into a quiescent or co-flowing medium, generating a shear layer that rapidly transitions to turbulence. The near-field region close to the nozzle exit is dominated by strong mixing, coherent vortical structures and growth of the jet width. Further downstream, the flow approaches a self-similar state characterised by a power-law decay of centreline velocity and progressive entrainment of ambient fluid. When the jet impinges on a surface or interacts with neighbouring jets, complex recirculation zones and enhanced heat transfer rates occur. Heat transfer in turbulent jets is governed by convective mechanisms, with local heat fluxes quantified by dimensionless Nusselt numbers. Applications span industrial process cooling, turbine blade impingement cooling, combustion mixing, oceanic discharges and atmospheric outflows. Recent advances have improved understanding of multijet interactions, wall-jet cooling strategies and three-dimensional spreading laws, yielding refined models for design optimisation and scale-up.
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Turbulent Jet Flow Dynamics and Heat Transfer publication trend
The graph below shows the total number of articles in turbulent jet flow dynamics and heat transfer across all publications each year (not limited to Nature Index journals).
Technical terms
Reynolds number: Ratio of inertial to viscous forces governing turbulence onset.
Nusselt number: Ratio of convective to conductive heat transfer at a surface.
Entrainment: Process by which ambient fluid is drawn into and mixed with the jet.
Turbulent kinetic energy: Mean kinetic energy per unit mass associated with turbulent fluctuations.
References
- Experimental investigation of dual jet flow past a heated surface: Effect of Reynolds number. International Journal of Heat and Mass Transfer (2024).
- Scaling and similarity laws in three-dimensional wall jets. Physics of Fluids (2023).
- Two-Dimensional Dual Jets—A Comprehensive Review of Experimental and Numerical Analyses. Energies (2024).
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