Mode transition in fluid–structure interaction of piezoelectric membrane wings

The challenges of food security are exacerbated by the world's expanding population and diminishing agricultural land. In response, hydroponic cultivation offers a potentially more sustainable approach to growing nutrient-dense crops compared to traditional methods. Motivated by this understanding, we conducted a series of experiments to explore the behavior of Brassica juncea (Pusa Jaikisan) plant roots under various flow configurations within a controlled environment. The flow configurations considered were no-flow/flow (NF/F), continuous flow, flow/no-flow (F/NF), and stagnation. Additionally, we conducted anatomical sectioning of plant roots to study how different flow configurations affect the cellular structure of the plant root cross section. We also performed numerical simulations to investigate the internal stress generated within plant roots under various flow conditions. We observed that an increased number of cortical cells developed in response to higher internal stress in the case of continuous flow, which protected the inner vascular bundle from excessive biological stress. Comparing the designs, we found that continuous flow resulted in a longer root length compared to the F/NF and NF/F configurations. The root length per unit average flow power was highest for the 2 h F/NF case, followed by the 2 h NF/F, 3 h F/NF, and continuous flow cases. This suggests that periodic flow conditions (F/NF and NF/F) with lower average power, a necessary requirement for economical use, led to longer root lengths. Furthermore, we observed that the nitrogen uptake per unit average flow power was higher for the F/NF configuration compared to continuous flow. Consequently, we infer that in hydroponic cultivation, altering the flow configuration to a F/NF type could be more cost-effective with less nutrient solution wastage, promoting better plant root growth compared to a continuous flow scenario.

show abstract

Wake interference effects on flow-induced vibration of flexible membrane wings

Li,

Jaiman,

Lei

et al. 2024

Physics of Fluids

View full text Add to dashboard Cite

This work investigates the effect of wake interference on the nonlinear coupled dynamics and aerodynamic performance of flexible membrane wings at a moderate Reynolds number. A high-fidelity computational aeroelastic framework is employed to simulate the flow-induced vibration of flexible membrane wings in response to unsteady vortex wake flows produced by an upstream stationary circular cylinder. The coupled dynamics of the downstream membrane are investigated at different gap ratios, aeroelastic numbers, and offset distances. The variations in flow features, membrane responses, and frequency characteristics are analyzed to understand the wake interference effect on membrane aeroelasticity. The results indicate that the aerodynamic performance and flight stability of the downstream membrane are degraded under the wake interference effect. Four distinct flow regimes are classified for the cylinder–membrane configuration, namely (i) single body flow, (ii) co-shedding I, (iii) co-shedding II, and (iv) detached vortex-dominated vibration, respectively. The mode transition is found to build new frequency synchronization between the flexible membrane and its own surrounding flows, or the wake flows of the cylinder, to adjust the aerodynamic performance and membrane vibration. This study sheds new light on membrane aeroelasticity in response to wake flows and enhances understanding of the fluid–membrane coupling mechanism. These findings can facilitate the development of next-generation bio-inspired drones that have high flight efficiency and robust flight stability in gusty flows.

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

hi@scite.ai

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

Henderson, NV 89052, USA

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.

Mode transition in fluid–structure interaction of piezoelectric membrane wings

Cited by 3 publications

References 47 publications

Incomplete fluid–structure coupling mechanism of a flexible membrane wing

Incomplete fluid–structure coupling mechanism of a flexible membrane wing

Intermittent flow influences plant root growth: A phytofluidics approach

Wake interference effects on flow-induced vibration of flexible membrane wings

Contact Info

Product

Resources

About