Bottom friction effects on linear wave propagation

Simarro, Gonzalo; Orfila, Alejandro; Galán, Álvaro; Zarruk, Gustavo A.

doi:10.1016/j.wavemoti.2009.06.009

Cited by 2 publications

(3 citation statements)

References 10 publications

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“…The relative concentration inside the PTFE composites had a little difference. The relative concentration on the frictional interface of the PC/Cu system was higher than that for the PC/SiO 2 /Cu system due to boundary effect (Simarro et al , 2009). Boundary layer was formed with much more atoms accumulation on the surface of PC.…”

Section: Resultsmentioning

confidence: 95%

Effect of SiO₂on the tribological properties of PTFE sliding against Cu: a molecular dynamics simulation

Song

Zhao

Ding

et al. 2022

ILT

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Purpose The purpose of this paper is to investigate the effect of SiO2 on the tribological properties of polytetrafluoroethylene (PTFE) composites from an atomic level. Design/methodology/approach Effect of SiO2 on the tribological properties of PTFE sliding against Cu was studied by molecular dynamics (MD) simulations to explore the inherent mechanisms from an atomic level. Findings SiO2 had a higher interaction energy with PTFE than copper, which contributed to an increase of interfacial temperature and velocity with severe adhesive wear on the PTFE molecules. Originality/value This study reveals the mechanism of SiO2 on the friction and wear behavior of PTFE by MD simulation.

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Section: Resultsmentioning

confidence: 95%

Effect of SiO₂on the tribological properties of PTFE sliding against Cu: a molecular dynamics simulation

Song

Zhao

Ding

et al. 2022

ILT

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“…Therefore, a quantitative understanding of the mechanism of wave induced bottom boundary layers is of primary importance in predicting coastal or continental shelf processes [1]. Moreover, the bottom boundary layer in water wave propagation is important, because it determines the stress that the water transmits to the bottom, which is important in the near shore morphodynamics and ecosystems, since bottom shear stress is responsible for sediment transport [2][3][4].…”

Section: I Introductionmentioning

confidence: 99%

“…The SST k- model was used to determine some unknown quantities in equation (4). The SST k- model is a two-equation model that gives results similar to the k- model of Wilcox in the inner of boundary layer but changes gradually to the Jones-Launder k- model towards to the outer boundary layer and the free stream velocity.…”

Section: I Introductionmentioning

confidence: 99%

A New Method for Modeling Bottom Shear Stress under Irregular Waves

Rachman¹,

Suntoyo²

2011

JTS

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The bottom shear stress estimation is the most important step to device an input to all the practical sediment transport models. In this paper, the modeling of bottom shear stress in a rough turbulent bottom boundary layer under irregular waves of experimental result is examined by a new calculation method of bottom shear stress based on incorporating velocity and acceleration terms simultaneously. A new acceleration coefficient is proposed to formulate the bottom shear stress under irregular waves. The new formula is further examined with a basic harmonic wave cycle modified with the phase difference and square of the instantaneous friction velocity incorporating the acceleration effect as proposed by the previous researchers. The new method gave the smallest the RMSE value indicating that the new method has the best agreement with the bottom shear stress of experimental results. Therefore, it can effectively be utilized in a beach evolution model by combining it with the irregular wave transformation model. Keywordsbottom shear stress, irregular wave, and turbulent bottom boundary layer AbstrakEstimasi tegangan geser dasar merupakan tahapan paling penting yang diperlukan sebagai inputan pada kebanyakan model transportasi sedimen. Dalam makalah ini, pemodelan tegangan geser dasar dari hasil eksperimen turbulent bottom boundary layer melalui dasar kasar untuk gelombang irreguler diuji dengan sebuah metode kalkulasi baru tegangan geser dasar yang didasarkan dengan mengkombinasikan efek kecepatan dan percepatan secara bersamaan. Sebuah koefisien percepatan baru diusulkan untuk merumuskan tegangan geser dasar pada gelombang irreguler. Formula baru ini diuji lebih lanjut dengan harmonic wave cycle yang dimodifikasi dengan beda fasa seperti diusulkan oleh peneliti terdahulu dan kuadrat instantenous friction velocity dengan mengkombinasikan efek percepatan. Metode baru memberikan nilai RMSE terkecil dan menunjukkan bahwa metode baru memiliki persetujuan terbaik dengan tegangan geser dasar hasil eksperimen. Oleh karena itu, metode baru dapat dimanfaatkan secara efektif dalam model evolusi pantai dengan mengkombinasikan terhadap model transformasi gelombang irreguler.

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Bottom friction effects on linear wave propagation

Cited by 2 publications

References 10 publications

Effect of SiO₂on the tribological properties of PTFE sliding against Cu: a molecular dynamics simulation

Effect of SiO₂on the tribological properties of PTFE sliding against Cu: a molecular dynamics simulation

A New Method for Modeling Bottom Shear Stress under Irregular Waves

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Bottom friction effects on linear wave propagation

Cited by 2 publications

References 10 publications

Effect of SiO2on the tribological properties of PTFE sliding against Cu: a molecular dynamics simulation

Effect of SiO2on the tribological properties of PTFE sliding against Cu: a molecular dynamics simulation

A New Method for Modeling Bottom Shear Stress under Irregular Waves

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Product

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Effect of SiO₂on the tribological properties of PTFE sliding against Cu: a molecular dynamics simulation

Effect of SiO₂on the tribological properties of PTFE sliding against Cu: a molecular dynamics simulation