Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An efficient numerical model for liquid water uptake in porous material
  and its parameter estimation   The goal of this study is to propose an efficient numerical model for the
predictions of capillary adsorption phenomena in a porous material. The
Scharfetter-Gummel numerical scheme is proposed to solve an advection-diffusion
equation with gravity flux. Its advantages such as accuracy, relaxed stability
condition, and reduced computational cost are discussed along with the study of
linear and nonlinear cases. The reliability of the numerical model is evaluated
by comparing the numerical predictions with experimental observations of liquid
uptake in bricks. A parameter estimation problem is solved to adjust the
uncertain coefficients of moisture diffusivity and hydraulic conductivity.

28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga