《Table 2 Comparison of fl uidelastic coeffi cients》

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《Investigation of the Vibration Behavior of Fluidelastic Instability in Closely Packed Square Tube Arrays》

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A 3D tube model，shown in Fig.11，can be established based on the experimental parameters（Table 1）and assumptions above.A cubic fl uid fi eld with a uniform fl ow inlet and pressure outlet is adopted to simulate the test section in a water channel.A total of 25 tubes are arranged 5×5 to achieve a normal square in the fl uid domain.Moving mesh boundariesand rigid body movements are established to ensure that the tubes can vibrate under the fl uid forces.All tubes feature their own local coordinates and are free to oscillate in the streamwise and transverse directions.