Effect of streamwise vortex induced by streamwise grooves on drag reduction and heat transfer performance

Wang, Jiansheng; Fan, Yuntian; Ge, Jianan; Liu, Xueling

doi:10.1016/j.ijthermalsci.2022.108117

Cited by 5 publications

(2 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The drag reduction mechanism of lunar bone texture is that the microprotrusions on the textured surface inhibit the spanwise movement of the flow velocity bar, thereby disrupting the self-sustaining type of turbulence and reducing the formation of turbulence, achieving the effect of drag reduction. − After branching with polysaccharides on the textured surface, the formation of a hydrated layer , film further enhances the ability to suppress the spanwise movement of the flow velocity bar, achieving better drag reduction effects.…”

Section: Resultsmentioning

confidence: 99%

Biomimetic Slippery Surface with Exclusive Liquid-Repellent and Self-Cleaning Properties for Antifouling

Yang,

Mawignon,

et al. 2024

Langmuir

View full text Add to dashboard Cite

The nature always offers amazing inspiration, where it is highly desirable to endow coatings on marine equipment with powerful functions. An excellent example is slippery zone of Nepenthes pitcher, which possesses novel liquid-repellent and selfcleaning performance. Therefore, this study presents an efficient fabrication method to prepare a novel coating. The coatings were fabricated by designing biomimetic textures extracted from the lunate bodies of slippery zone on polydimethylsiloxane (PDMS) and then grafting Dictyophora indusiata polysaccharide (DIP) modifier. The as-prepared slippery coatings exhibited outstanding antifouling properties against kinds of daily life pollutants such as Chlorella and coffee. This synergistic strategy was proposed combined with environmentally friendly modifier grafting and heterogeneous microstructure on the surface to broaden new probabilities for manufacturing slippery coatings with incredible protective functionality.

show abstract

Section: Resultsmentioning

confidence: 99%

Biomimetic Slippery Surface with Exclusive Liquid-Repellent and Self-Cleaning Properties for Antifouling

Yang,

Mawignon,

et al. 2024

Langmuir

View full text Add to dashboard Cite

show abstract

“…The convective heat transfer in both directions was greatly enhanced in the case of an increased spatial fluid mixing in this sawtooth microchannel. Wang et al [15] used a numerical analysis to analyze the effect of flow direction grooves on the flow structure and overall thermal performance. The results of the study showed that the flow direction grooves disrupted the turbulent self-sustainability, resulting in drag reduction rates ranging from 11.7% to 16.78%.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Turbulent Flow Structure and Particle Deposition in a Three-Dimensional Heat Transfer Duct with Convex Dimples

Han

et al. 2023

Coatings

View full text Add to dashboard Cite

In engineering applications, dust deposition on the heat transfer channel greatly reduces the efficiency of heat transfer. Therefore, it is very significant to study the characteristics of particle deposition for thermal energy engineering applications. In this study, the Reynolds stress model (RSM) and the discrete phrase model (DPM) were used to simulate particle deposition in a 3D convex-dimpled rough channel. A discrete random walk model (DRW) was used for the turbulent diffusion of particles, and user-defined functions were developed for collisions between particles and walls. An improved deposition model of rebound between particles was developed. The flow structure, secondary flow, temperature distribution, Q criterion, and particle deposition distribution in the convex-dimpled rough channel were analyzed after a study of the grid independence and a numerical validation. The results showed that these mechanisms affected the flow structure in the flow field. For tiny particles (dp ≤ 10 μm), the presence of convex dimples promoted their deposition. The rates of particle deposition in the presence of convex dimples were 535, 768, 269, and 2 times higher than in smooth channels (particle sizes of 1, 3, 5, and 10 μm, respectively). However, for large particles (dp > 10 μm), although the presence of convex dimples had a certain effect on the location distribution of particle deposition, it had little effect on the deposition rates of large particles, which were 0.99, 0.98, 0.97 and 0.96 times those in the smooth channel, respectively.

show abstract

A study on the wake structure of an ascending submersible with silk flexible appendages using continuous wavelet transform and dynamic mode decomposition

Yan,

Zhang,

Rinoshika

et al. 2024

Experimental Thermal and Fluid Science

View full text Add to dashboard Cite

Effect of streamwise vortex induced by streamwise grooves on drag reduction and heat transfer performance

Cited by 5 publications

References 40 publications

Biomimetic Slippery Surface with Exclusive Liquid-Repellent and Self-Cleaning Properties for Antifouling

Biomimetic Slippery Surface with Exclusive Liquid-Repellent and Self-Cleaning Properties for Antifouling

Simulation of Turbulent Flow Structure and Particle Deposition in a Three-Dimensional Heat Transfer Duct with Convex Dimples

A study on the wake structure of an ascending submersible with silk flexible appendages using continuous wavelet transform and dynamic mode decomposition

Contact Info

Product

Resources

About