Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Data-assisted combustion simulations with dynamic submodel assignment
  using random forests   In this investigation, we outline a data-assisted approach that employs
random forest classifiers for local and dynamic combustion submodel assignment
in turbulent-combustion simulations. This method is applied in simulations of a
single-element GOX/GCH4 rocket combustor; a priori as well as a posteriori
assessments are conducted to (i) evaluate the accuracy and adjustability of the
classifier for targeting different quantities-of-interest (QoIs), and (ii)
assess improvements, resulting from the data-assisted combustion model
assignment, in predicting target QoIs during simulation runtime. Results from
the a priori study show that random forests, trained with local flow properties
as input variables and combustion model errors as training labels, assign three
different combustion models - finite-rate chemistry (FRC), flamelet progress
variable (FPV) model, and inert mixing (IM) - with reasonable classification
performance even when targeting multiple QoIs. Applications in a posteriori
studies demonstrate improved predictions from data-assisted simulations, in
temperature and CO mass fraction, when compared with monolithic FPV
calculations. These results demonstrate that this data-driven framework holds
promise for the dynamic combustion submodel assignment in reacting flow
simulations.

24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph