Application of spectral forcing in lattice-Boltzmann simulations of homogeneous turbulence

✍ Scribed by A. ten Cate; E. van Vliet; J.J. Derksen; H.E.A. Van den Akker

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 668 KB
• Volume: 35
• Category: Article
• ISSN: 0045-7930
• DOI: 10.1016/j.compfluid.2005.06.001

✦ Synopsis

An efficient numerical method for the direct simulation of homogeneous turbulent flow has been obtained by combining a spectral forcing algorithm for homogeneous turbulence with a lattice-Boltzmann scheme for solution of the continuity and Navier-Stokes equations. The spectral forcing scheme of Alvelius [Alvelius K. Random forcing of three-dimensional homogeneous turbulence. Phys Fluids 1999;11(7):1880-89] is used which allows control of the power input by eliminating the force-velocity correlation in the Fourier domain and enables anisotropic forcing. A priori chosen properties such as the Kolmogorov length scale, the integral length scale and the integral time scale are recovered. This demonstrates that the scheme works accurately with the lattice-Boltzmann method and that all specific features of the forcing scheme are recovered in the lattice-Boltzmann implementation.