Unsteady Flow Structure Interaction for Incompressible Flows Using Deformable Hybrid Grids

An embedded-boundary formulation for large-eddy simulation of turbulent flows interacting with moving boundaries

“…The parametric space was selected to match an experiment by Anagnostopoulos and Bearman [2], which has been used for validation in several other numerical simulations (see for example [53,31]). The mass ratio was set to n = 117.10 and the damping ratio to ζ = 0.0012.…”

“…The use of moving reference frames [31], or coordinate transformations [40,54] are characteristic examples. In more complex configurations formulations utilizing moving and/or deforming grids that continuously adapt to the changing location of the body have to be adopted (see for example [53,24] ). For problems that involve multiple bodies undergoing large motions and/or deformations, these algorithms are fairly complicated and have an adverse impact on the accuracy and efficiency of the fluid solvers.…”

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

“…Also plotted in these figures are data from previous numerical simulations (Li et al, 2002;Schulz and Kallinderis, 1998;Wei et al, 1995;Yang et al, 2008) and the experimentally predicted behaviour (Anagnostopoulos and Bearman, 1992). All previous computations use boundaryfitted methods, except Yang et al (2008), whose method is quite similar to the one presented here.…”

“…Nomura (1993), Schulz and Kallinderis (1998), and Wei et al (1995), all employed variations on the arbitrary Lagrangian-Eulerian technique to cope with moving body-fitted 2D grids, while Li et al (2002) used a spectral element fluid solver in a translating frame of reference, thereby negating the need for dynamic mesh regeneration. In all cases, the peak amplitude of vibration was in reasonable agreement with the experiments but the reduced velocity at which the peak occurred and the range of reduced velocities over which fluid dynamic excitation was observed were somewhat less so.…”

“…The experiments covered cylinder Reynolds numbers between Re = 90 and 140 with reduced velocities ranging from U red = 5·02 to 7·81. In addition to the experimental data, numerical simulation results (Kara et al, 2012b;Li et al, 2002;Nomura, 1993;Schulz and Kallinderis, 1998;Wei et al, 1995;Yang et al, 2008) are available for model comparison. Figure 8 shows a schematic representation of a cylinder that is elastically mounted and is allowed to move in the transverse direction.…”