Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Characteristic lengths at moving contact lines for a perfectly wetting
  fluid: the influence of speed on the dynamic contact angle   It is common to relate the dynamic contact angle $\theta_d$ to the relative
speed between the substrate and the contact line; theory suggests $\theta_d^3
\propto U$. In fact, available physical models show that the dynamic angle
involves speed logarithmically and in a model dependent manner. Experimental
data consistent with this interpretation is cited.

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The categories of this paper are: eess
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The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
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The categories of this paper are: acc-phys
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The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
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The categories of this paper are: q-alg
2
The categories of this paper are: math
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The categories of this paper are: nucl-th
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The categories of this paper are: astro-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: nlin
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-lat