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This is a Experimental Study study.

October 10, 2025

Streamwise Fluidelastic Instability in Rotated Square Array With Loose Supports

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Research reveals fluidelastic instability in U-bend tube bundles due to radial clearance changes, suggesting safety risks.

Fluidelastic instability shows sensitivity to radial clearance values, emphasizing the need for careful design.
Threshold analysis indicates that the instability could occur under specific cross-flow conditions, leading to potential failures.
Investigation employed a rotated square array exposed to air cross-flow, capturing vital dynamic interactions within the setup.
Findings highlight significant implications for operational safety in heat exchanger designs and serviceability.

Elhelaly et al. (2025) studied this question.

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