A Santos - arXiv preprint arXiv:0809.1731, 2008 - arxiv.org
The flow characterized by a linear longitudinal velocity field $ u_x (x, t)= a (t) x $, where $ a
(t)={a_0}/({1+ a_0t}) $, a uniform density $ n (t)\propto a (t) $, and a uniform temperature $ T …