Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Development and validation of a transition model based on a mechanical
  approximation   A new 3D transition turbulence model, more accurate and faster than an
empirical transition model, is proposed. The model is based on the calculation
of the pre-transitional u'v' due to mean flow shear. The present transition
model is fully described and verified against eight benchmark test cases.
Computations are performed for the ERCOFTAC flat-plate T3A, T3C and T3L test
cases. Further, the model is validated for bypass, cross-flow and separation
induced transition and compared with empirical transition models. The model
presents very good results for bypass transition under zero-pressure gradient
and with pressure gradient flow conditions. Also the model is able to correctly
predict separation induced transition. However, for very low speed and low
free-stream turbulence intensity the model delays separation induced transition
onset. The model also shows very good results for transition under complex
cross-flow conditions in three-dimensional geometries. The 3D tested case was
the 6:1 prolate-spheroid under three flow conditions.

26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph