DNS of flow past a stationary and oscillating cylinder at

Calculation of fluid–structure interaction: methods, refinements, applications

“…The 2D DNS of Dong and Karniadakis (2005), performed with their spectral/hp code, showed very impressive levels of agreement with the experiments of Gopalkrishnan (1993). Due to the substantial computational expense of the simulationsthe most highly resolved case required 250 000 central processing unit hours -only four oscillation frequencies and one amplitude ( f o D/U = 14, 0·17, 0·21, 0·25 and A y /D = 0·3) were computed.…”

Desenvolvimento da modelagem de turbulência e interação fluido-estrutura para as vibrações induzidas por vórtices de cilindro rígido.

“…Blackburn & Henderson (1999) have also studied wake structures and flow dynamics associated with two-dimensional flows past cylinder in forced vibration at Re = 500. Dong & Karniadakis (2005) have used direct numerical simulations employing a spectral method for Re = 10, 000 for a few vibration frequencies, finding very good agreement with the experimental results from Gopalkrishnan (1993).…”

“…They have shown that the transition waves develop in the separated shear layers leading to mixing layer eddies and concluding that the instability leading to mixing layer eddies has a two-dimensional origin. Dong & Karniadakis (2005) have done three-dimensional calculations for the cylinder flow at an impressively high Reynolds number of 10, 000.…”

Effect of bidirectional internal flow on fluid.structure interaction dynamics of conveying marine riser model subject to shear current

“…In the field of numerical simulation, semi-experimental models, discrete vortex method (DVM) and industrially significant FSI solution packages have been introduced for practical calculation. They were performed partly through the use of direct numerical simulations (DNS) (Dong and Karniadakis, 2005), large eddy simulations (LES) (with improved sub-grid scale models) (Al-Jamal and Dalton, 2004;Fujisawa, et al, 2005), unsteady Reynolds-averaged Navier-Stokes equations (URANS) (Saghafian, et al, 2003;Guilmineau and Queutey, 2004;Wanderley, et al, 2006), vortex element methods (VEM) (Mittal and Kumar, 2001;Nobari and Naredan, 2006) and their various combinations. Recent years, with the rapid development of computer technology and CFD software, it becomes practicable to conduct the FSI simulation about flexible riser with highly resolved flow models.…”