Sensitivity of Reynolds stress decay to computational parameters in forced anisotropic homogeneous turbulence

Computational studies of homogeneous turbulence typically involve simulations in periodic boxes. While most such models are historically focused on unforced turbulence, linear forcing of the momentum equation has been recently leveraged as a way of inducing anisotropy in Reynolds stresses (see for example, Dhandapani et al. Phys. Rev. Fluids, 2019). A key factor in establishing the convergence of statistics with respect to the computational domain size and shape is through the elimination of low wave number content in the forcing term via the use of high-pass filters (Homan et al. Phys. Rev. Fluids, 2024). Considering that existing work has dominantly used isotropic filters, this study examines the influence of more general filter parameters on the behavior of the resulting turbulence.