Large-Eddy Simulation of turbulent heat transfer in a multiple-started helically rib-roughened pipe

Akermann, Kevin; Renze, Peter; Dietl, Jochen; Schröder, Wolfgang

doi:10.1016/j.ijheatmasstransfer.2020.119667

Cited by 15 publications

(12 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The x + and z + values are between 4 and 14. The validation study by Akermann et al 18 shows that this level of accuracy is appropriate for the current task.…”

Section: Numerical Methodology and Geometrymentioning

confidence: 87%

“…But multiple-started helically pipes with complex rib geometries are state-of-the-art in modern manufacturing processes and are of highest industrial relevance. In a previous study by Akermann et al 18 it has been shown that the LES method used in the current study is accurate enough to represent the flow in multiplestarted helically ribbed pipes. In their work, Akermann et al 18 examined the turbulent heat transfer in a pipe with helical structures for the first time with LES.…”

Section: Introductionmentioning

confidence: 83%

“…In a previous study by Akermann et al 18 it has been shown that the LES method used in the current study is accurate enough to represent the flow in multiplestarted helically ribbed pipes. In their work, Akermann et al 18 examined the turbulent heat transfer in a pipe with helical structures for the first time with LES. The results are compared with measurement data of the Nusselt (Nu) number and the pressure drop.…”

Section: Introductionmentioning

confidence: 83%

“…The following results are collected after 6 cycles and averaged during 7 cycles, similar to Campet et al 16 After F I G U R E 4 Schematic representation of a helically ribbed pipe geometry. Illustration from Akermann et al 18 F I G U R E 5 Instantaneous velocity field of a fully turbulent flow at a point in time after six flow cycles.…”

Section: Comparison Of the Pressure Loss And Nusselt Number With Meas...mentioning

confidence: 99%

See 3 more Smart Citations

Investigation of heat transfer and pressure drop for a multiple‐started ribbed pipe using large‐eddy simulation

et al. 2022

Self Cite

View full text Add to dashboard Cite

Turbulent heat transport phenomena in multiple‐started helically ribbed pipes are investigated. Such structures are applied to enhance heat transfer in various technical systems. A large‐eddy simulation (LES) approach is used to model the turbulent flow field. The simulation results for heat transfer and pressure loss are in good agreement with available experimental data and the simulation model is successfully validated for complex surface geometries. For a better understanding of the impact of the wall structures on the turbulent transport processes, local profiles of the relevant flow variables values are investigated. Thus, the specific mechanism of the heat transfer enhancement can be explained and a knowledge‐based optimization of innovative structures is possible.

show abstract

“…The x + and z + values are between 4 and 14. The validation study by Akermann et al 18 shows that this level of accuracy is appropriate for the current task.…”

Section: Numerical Methodology and Geometrymentioning

confidence: 87%

Section: Introductionmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 83%

Section: Comparison Of the Pressure Loss And Nusselt Number With Meas...mentioning

confidence: 99%

See 2 more Smart Citations

Investigation of heat transfer and pressure drop for a multiple‐started ribbed pipe using large‐eddy simulation

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…The gas explosion process uses a one-step reaction. The large eddy model (LES) was used to simulate the characteristics of turbulence [ 37 , 38 ]. The laminar finite rate/eddy dissipation model in a turbulent premixed flame was used in the combustion process [ 39 ].…”

Section: Numerical Parameters Setting and Experimental Verificationmentioning

confidence: 99%

Propagation laws of discontinuous gas supply in the excavation roadway

Gao

Shi

et al. 2022

PLoS ONE

View full text Add to dashboard Cite

An explosion with a discontinuous gas supply (DGS-explosion) is more complicated than a common secondary explosion. We present the results of a study on the propagation laws of the DGS-explosion induced by a gas explosion in excavation roadways. A rectangular tube was established using ANSYS, similar to an excavation roadway in an underground coal mine. The gas, flame, and shock wave propagation laws were determined by analyzing the explosive gas as it exited the excavation roadway. The results show that the initial explosion caused the flame generated in the DGS-explosion to be significantly stretched. Moreover, the shock wave was reflected by the end of the tube, which resulted in the reverse migration of the local gas after the DGS-explosion. Meanwhile, with the increase in local gas concentrations, the pressure peak and the entire explosion system can increase after the DGS-explosion. The flame region, temperature peak, and flame irregularity in the tube positively correlate with the concentration. These results can provide theoretical support and an experimental basis for preventing and responding to accidents caused by gas explosion accidents.

show abstract

Dissimilarity Between Heat and Momentum Transfer of Turbulent Heat Transfer over Surfaces with Hemisphere Protrusions

Nagura

Kuwata

Suga

2021

Springer Proceedings in Physics

View full text Add to dashboard Cite

Large-Eddy Simulation of turbulent heat transfer in a multiple-started helically rib-roughened pipe

Cited by 15 publications

References 20 publications

Investigation of heat transfer and pressure drop for a multiple‐started ribbed pipe using large‐eddy simulation

Investigation of heat transfer and pressure drop for a multiple‐started ribbed pipe using large‐eddy simulation

Propagation laws of discontinuous gas supply in the excavation roadway

Dissimilarity Between Heat and Momentum Transfer of Turbulent Heat Transfer over Surfaces with Hemisphere Protrusions

Contact Info

Product

Resources

About