non-intrusive model reducti
on computational method using
hypersurfaces representation has been developed for reservoir s
imulation and
further applied to 3D fluvial channel problems in this work. Th
is is achieved by
a combination of a radial basis function (RBF) interpolation an
d proper
orthogonal decomposition (POD) method. The advantage of the met
hod is that
it is generic and non-intrusive, that is, it does not require m
odifications to the
original complex source code, for example, a 3D unstructured me
sh control
volume finite element (CVFEM) reservoir model used here. The ca
pability of
this non-intrusive reduced order model (NIROM) based on hypersu
rfaces
representation has been numerically illustrated in a horizontal
ly layered porous
media case, and then further applied to a 3D complex fluvial channel case. By
comparing the results of the NIROM against the solutions obtain
ed from the
high fidelity full model, it is s
hown that this NIROM results i
n a large
reduction in the CPU computation
cost while much of the details
are captured.