• Mr. Y. Vijay bhasker Naidu
• Dr. R. P. Chowdary
• Dr. Ch. Indira Priyadarsini

This paper presents a detailed computational investigation into the fluid flow and thermal characteristics of a valvular conduit channel incorporating a Tesla valve structure. Utilizing three-dimensional numerical simulations, the study explores the effects of geometric parameters, flow directionality, and Reynolds number variation on the hydrodynamic and thermal performance of the channel. The focus lies on understanding the mechanisms by which Tesla valves achieve flow rectification and enhance convective heat transfer without moving components. The simulations examine both forward and reverse flows, revealing significant asymmetries in velocity distribution, pressure drop, and heat transfer rates. In forward flow, the formation of longitudinal vortices stabilizes the boundary layer, resulting in moderate heat transfer enhancement. Conversely, reverse flow induces transverse vortices, which compress the thermal boundary layer and increase turbulence, thereby boosting heat transfer effectiveness. This directional disparity is quantified through variations in the Nusselt number, friction factor, and a newly defined thermal diodicity index (Dit). Key findings demonstrate that increasing conduction angles and side channel lengths influence the valve’s diodicity and thermal efficiency. While larger angles enhance vortex strength and improve reverse-flow heat transfer, they also elevate flow resistance. The study further identifies the trade-off between thermal performance and pressure drop, emphasizing the importance of geometric optimization in practical designs. Grid independence and validation against empirical benchmarks confirm the reliability of the CFD model. The results offer design guidelines for optimizing Tesla valve-based microchannel systems for thermal management applications such as compact heat exchangers, battery cooling, and microfluidic devices. Overall, the study establishes a foundational understanding of the coupled fluid-thermal behavior in valvular conduits and provides a predictive framework for engineering passive flow control and heat transfer devices using Tesla valve architectures.

Tesla valve, valvular conduit, heat transfer, CFD, Nusselt number, friction factor, vortex dynamics, reverse flow, numerical modeling.

"Numerical Investigation Of Fluid Flow And Thermal Behaviour In A Valvular Conduit Channel", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.12, Issue 6, page no.i421-i426, June-2025, Available :http://www.jetir.org/papers/JETIR2506854.pdf

"Numerical Investigation Of Fluid Flow And Thermal Behaviour In A Valvular Conduit Channel", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.12, Issue 6, page no. ppi421-i426, June-2025, Available at : http://www.jetir.org/papers/JETIR2506854.pdf