Impinging jets – a short review on strategies for heat transfer enhancement

Năstase, Ilinca; Bode, Florin

doi:10.1051/e3sconf/20183201013

Cited by 5 publications

(3 citation statements)

References 47 publications

(58 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, in order to maintain a plug flow and intensify heat and mass transfer, generating vorticity in the flow regions is a key success factor. This can be achieved using several methods that exist in the literature, such as jets [5] and turbulence promoters or vorticity generators for generating embedded vortices [6], [7], and wall curvature [8]- [10] for inducing secondary flows (Dean vortices). This last technique leads to implementing corrugated geometries in compact HEX reactors.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of the heat transfer in a meandering millichannel by a coupled 1D-flow-channel / 3D-surrounding-solid model

Maarawi

Anxionnaz‐Minvielle

Coste

et al. 2023

Chemical Engineering Research and Design

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Numerical investigation of the heat transfer in a meandering millichannel by a coupled 1D-flow-channel / 3D-surrounding-solid model

Maarawi

Anxionnaz‐Minvielle

Coste

et al. 2023

Chemical Engineering Research and Design

View full text Add to dashboard Cite

“…In recent years, both experimental and numerical investigation tools and techniques have undergone exponential developments that allow for a deeper understanding of the phenomena involved in the impinging jets. Various review articles have approached the subject of heat and mass transfer in impinging jets beginning with 1977 [13] and continuing later with [14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Heat and mass transfer enhancement strategies by impinging jets: A literature review

2021

Self Cite

View full text Add to dashboard Cite

Heat and mass transfer can be greatly increased when using impinging jets, regardless the application. The reason behind this is the complex behavior of the impinging jet flow which is leading to the generation of a multitude of flow phenomena, like: large-scale structures, small scale turbulent mixing, large curvature involving strong normal stresses and strong shear, stagnation, separation and re-attachment of the wall boundary layers, increased heat transfer at the impinged plate. All these phenomena listed above have highly unsteady nature and even though a lot of scientific studies have approached this subject, the impinging jet is not fully understood due to the difficulties of carrying out detailed experimental and numerically investigations. Nevertheless, for heat transfer enhancement in impinging jet applications, both passive and active strategies are employed. The effect of nozzle geometry and the impinging surface macrostructure modification are some of the most prominent passive strategies. On the other side, the most used active strategies utilize acoustical and mechanical oscillations in the exit plane of the flow, which in certain situations favors mixing enhancement. This is favored by the intensification of some instabilities and by the onset of large scale vortices with important levels of energy.

show abstract

“…Multiple Impinging jets provide the best configuration for convective heat and mass transfer as well as forces, due to the jet flow acting on the sheets. The heat transfer caused by the turbulent impinging jet has been extensively investigated by various researchers [1][2][3]. The simple case of a single impinging jet has been widely studied both experimentally and numerically and hence forms a good platform for numerical model validation.…”

Section: Introductionmentioning

confidence: 99%

Numerical Prediction of the Second Peak in the Nusselt Number Distribution from an Impinging Round Jet

Chitsazan¹,

Klepp²,

Glasmacher³

2021

IJHT

View full text Add to dashboard Cite

The results of numerical simulations of a single impinging round jet, using different numerical parameters are presented. To simulate the heat transfer in industrial drying with arrays of different jets the heat transfer for a single round jet (Re=23000 based on jet’s diameter and bulk velocity and the dimensionless jet’s outlet to target wall distance= 2) is used as a test case to validate the numerical model. The distribution of the Nusselt-number serves as a benchmark and the computational cost with regard to CPU-time and memory requirements should be minimal. To accurately predict the intensity and position of the secondary peak from an impinging flow, different approaches for turbulence modeling are considered and their results are compared with data from the literature. The influence of the grid size and the grid shape is analyzed and the grid-independent solution is determined. The results using different implementations of the SST k-omega model, as the best compromise between the computational cost and accuracy are compared. Low Re damping modification in the implementation of SST K-ω has an important role in the prediction of the secondary peak. Good results can be achieved with a coarse grid, as long as the boundary region is appropriately resolved. Polyhedral grids produce good quality results with lower memory requirements and cell numbers as well as shorter run times.

show abstract

Impinging jets – a short review on strategies for heat transfer enhancement

Cited by 5 publications

References 47 publications

Numerical investigation of the heat transfer in a meandering millichannel by a coupled 1D-flow-channel / 3D-surrounding-solid model

Numerical investigation of the heat transfer in a meandering millichannel by a coupled 1D-flow-channel / 3D-surrounding-solid model

Heat and mass transfer enhancement strategies by impinging jets: A literature review

Numerical Prediction of the Second Peak in the Nusselt Number Distribution from an Impinging Round Jet

Contact Info

Product

Resources

About