What is the minimum size at which viscous dampers are considered ineffective?

Viscous dampers are typically used in engineering applications to absorb and dissipate energy, particularly in structures subjected to dynamic loads such as vibrations or seismic activities. The sizing of these dampers is crucial for their effectiveness. It is generally understood that when the size of the viscous dampers is less than or equal to 2 inches, their performance tends to diminish significantly.

Once the size exceeds 2 inches, dampers become more effective because they can accommodate greater fluid flow, which enhances their ability to absorb energy and reduce vibrations. This threshold is based on principles of fluid dynamics and the physical characteristics of the damper's operation, which includes factors like the cross-sectional area through which the viscous fluid must flow.

Thus, stating that viscous dampers become ineffective at sizes less than or equal to 2 inches provides a clear understanding of why the cutoff point is established at this size, leading to the conclusion that "greater than 2 inches" represents the effective threshold for damper design and application.