Is it known what is the critical value for the number of particles (atoms, molecules) below which the system can not be described as a continuous media Wikipedia?
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$\begingroup$ It would depend entirely on the physics that you're interested in modelling. In the case of mechanical stress, for instance, this paper places the threshold at approximately 5 nm. $\endgroup$– lemonCommented Nov 5, 2017 at 11:10
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$\begingroup$ @lemon It depends on the physics. How about fluids? $\endgroup$– WoofDoggyCommented Nov 5, 2017 at 11:12
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1$\begingroup$ Related: physics.stackexchange.com/q/102132/25301 $\endgroup$– Kyle KanosCommented Nov 5, 2017 at 11:51
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