Abstract
The present study focuses on numerical analysis of thermo-hydraulic characteristics in a straight isothermally heated channel with a bottom wall-mounted flexible flow modulator under pulsating flow conditions. The fluid-structure interaction problem is formulated in Arbitrary Lagrangian-Eulerian framework via finite element method for solving necessary governing equations. The pulsating characteristics of fluid flow are represented by Strouhal number (St) and amplitude of oscillation (A) and varied within the range of 0.05 ≤ St ≤ 0.40 and 0.15 ≤ A ≤ 0.50 respectively for a fixed Reynolds number. The length of the flexible modulator (Lf) has been varied within 0.4 ≤ Lf ≤ 1.0 to explore its effect on the overall performance of the system. The results have been evaluated in terms of vorticity and isotherm distributions, Nusselt number, and modulator tip displacement. Moreover, Power Spectrum Analysis aided by FFT has been conducted to interpret the oscillatory behavior of thermal frequency and modulator deflection. The study reveals that a pulsating frequency of St = 0.20 and a higher amplitude of the pulsating inflow offer the best thermal augmentation. Although the longest modulator offers higher heat transfer, an optimum length of Lf = 0.6 provides the best overall performance at minimum pressure loss.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
