  This work is an attempt to develop an approximate scheme for estimating the
volume-based truncation errors in the finite volume analysis of laminar flows.
The volume-based truncation error is the net flow error across the faces of a
control volume. Unfortunately, truncation error is not a natural outcome of the
finite volume solution and needs to be estimated separately. Previous works in
the literature estimate truncation error using either higher order
interpolation schemes, higher order discretization schemes, or neglected terms
in the discretization scheme. The first two approaches become complicated on
general unstructured meshes and the third approach provides inaccurate results.
This work proposes a truncation error estimation scheme, which is based on the
third approach, but provides more accurate results compared to the existing
results in the literature. The potential application of such a truncation error
estimation scheme is in mesh adaptation.
