Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An improved boundary condition at a low grid resolution and Reynolds
  number   Complex geometries can be easily treated using the well-known full-way and
half-way bounce-back rules. However, the accuracy of the full-way bounce-back
rule is one order lower than the half-way bounce-back rule. Moreover, when the
walls are not aligned with the lattices, the errors increase. Including the
collision operator on the walls with the full-way bounce-back rule leads to an
improvement of the accuracy of the pressure-drop, but, a loss of momentum is
observed on concave corners. We propose to improve the momentum conservation by
adding an extrapolation of the density by the inverse distance weighting at
concave corners. The technique is shown to give a second-order accuracy at a
lower grid resolution, thus, the computational cost can be reduced.

29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph