The dynamic subgrid-scale (DSGS) closure model is used in a large eddy simu
lation computer program for incompressible isothermal flows. One of the adv
antages of the DSGS model is the exclusion of a model coefficient. This mod
el coefficient is evaluated dynamically at each nodal location for a given
time step by filtering operations on the grid level and a test filter level
. A nonstaggered array tube bundle geometry arrangement is considered in do
ubly periodic boundary conditions for two-dimensional simulations at high R
eynolds number. Results of the DSGS simulation are obtained in the form of
power spectral densities and visualization of flow characteristics. The DSG
S model simulation results are compared to the Smagorinsky eddy viscosity m
odel simulation and available experimental data. The DSGS model simulation
is found to be in good agreement with spectral data available from experime
nts in similar bundle arrangements. Coherent eddy structures were observed.
Body forces acting on the tubes showed satisfactory characteristics. integ
ral length and timescales are evaluated using correlation functions that de
scribe the turbulence structure. The applicability of large eddy simulation
to complex engineering flow situations has been shown using the DSGS model
with applications to steam generator bundles for understanding of flow ind
uced vibration problems revealing the physical phenomena of the flow.