Effect of the curvature of elastic plates on the evolution of pulsatile flow fields

Early fluid mixing in channel flows without incurring much drop in the pressure head is desired in industrial applications. This study explores wall-mounted flexible plates as obstacles to enhance mixing in channel flows. Using fluid–structure-scalar interaction simulations, we investigate the oscillations of the flexible plates under the flow, which serve as a vortex generator and help increase the mixing. The channel flow involves a scalar field with distinct concentrations initially separated across the channel, gradually intermixing due to vortical structures of varying scales. We have used the “mixing index” and “head loss” metrics along the channel length to assess the mixing quality when plates with different flexibility (characterized by the Cauchy number, Ca) are used. This study introduces a comprehensive criterion, the “coefficient of performance,” derived by comparing mixing and head loss in the presence and absence of obstacles. Aggregating results across various Ca values reveal that flexible plates substantially improve fluid mixing compared to rigid plates. We have also investigated the effect of the pulsatile fluid inlet (quantified by Strouhal number, Stf) and found that lower inlet flow pulsation (Stf<32) adversely impacts mixing performance, recommending a steady inlet flow. However, at high Stf, specifically in the configuration with Ca = 0.06 and Stf = 32, the best mixing performance is achieved in the channel, which marginally outperforms the steady inlet case. The conclusive takeaways from this study are that the plates with increased flexibility result in better mixing, and high inlet pulsation can be employed to fine-tune the mixing performance for further enhancement.

show abstract

On the maximum operating frequency of prosthetic heart valves

Palacios-Morales

Vicente

Beltrán

et al. 2018

Biomed. Phys. Eng. Express

View full text Add to dashboard Cite

A criterion is presented to evaluate the maximum pulsating flow frequency beyond which prosthetic heart valves cease to properly operate. The idea is tested with the experimental measurements obtained with an biological Edwards-Carpenter valve type model. It is found that beyond a certain characteristic frequency, the valve is no longer capable of fully operating in a cyclic manner. Furthermore, based on data recently reported by other authors, this preliminary comparison suggests that for a wide range of materials, leaflet sizes and operating conditions prosthetic heart valves might fail to properly operate for frequencies beyond 4.5 Hz (or 240 ppm).

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Effect of the curvature of elastic plates on the evolution of pulsatile flow fields

Cited by 3 publications

References 36 publications

Experimental study of the deflections of curved plates exposed to pulsating cross-flows

Experimental study of the deflections of curved plates exposed to pulsating cross-flows

Flexible structures enhance fluid mixing in a channel flow

On the maximum operating frequency of prosthetic heart valves

Contact Info

Product

Resources

About