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We present the fabrication process and the optical characterization of waveguides made by an ion-exchange technique in high-index D0035 and D0042C Corning glasses. We fabricate monomode channel waveguides in both kinds of glasses by exchange through a metallic mask.

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The present paper suggests a hybrid system identification method to estimate the flutter derivatives from coupled free vibration tests. An optimized covariancebased method is used as the initial guess in the modified unifying least squares method. This combination optimizes the accuracy described by the coefficients of determinations between measured and synthesized signals. Flutter derivatives are identified at high wind speeds, close to and even above the critical flutter wind speed. Results for a sharp-edged rectangular section with a width-to-depth ratio B/D = 10 are presented for two different torsional-to-vertical frequency ratios. In one case the torsional frequency are lower than the vertical, due to a high mass moment of inertia, which makes it possible to estimate the flutter derivatives at very high reduced wind speeds. This reveals that the torsional aerodynamic damping derivative A * 2 reaches a positive maximum followed by a continuous decreasing tendency and eventually negative A * 2 values are identified. This implies that torsional flutter for the B/D = 10 section can be avoided if the structural damping is designed to balance the negative torsional aerodynamic damping expressed by the positive peak value for A * 2 .

The uniform flow around a circular cylinder at Reynolds number 1e5 is simulated in a three dimensional domain by means of the newly developed Self-induced angular Moment Method, SMoM, turbulence model. The global force coefficients, Strouhal number, pressure distributions and wall shear stress distributions are compared to experimental findings reported in literature. The SMoM turbulence model is found to provide maximum, minimum and time-mean pressure coefficient distributions in very good agreement with experimental findings.