... Abstract A numerical investigation of three-dimensional flow past an oscillating cylinder at Re = 400 was carried out to investigate the effects of oscillation mode on flow structure and forces. The cylinder is forced to oscillate with a frequency in the in-line direction twice...

... layer by introducing a sloped bottom with different tilt angle. PIV measurements performed in a circulating water channel verify the effectiveness of the flow field simulation. It is demonstrated that bottom slope has evident effect on cavity's oscillation mode, oscillation frequency and sound pressure...

... to the oscillation modes. Numerical results are compared with PIV measurements to verify the calculation credibility. Results show that: cavity flow will oscillate as the L/θ or U increases. However the determining factor is the friction velocity. The key factor that determines the oscillation mode is L/H...

... and the effectiveness confirmed. oscillation mode oscillation full penetration frequency voltage oscillation molten pool welding condition base metal metals & mining voltage artificial intelligence partial penetration penetration control system experiment arc voltage welding thickness peak...