The Lagrangian dynamics of thermal tracer particles in Navier-Stokes fluids Massimo Tessarotto, Claudio Cremaschini, Claudio Asci, Alessandro Soranzo, Gino Tironi and Marco Tessarotto Eur. Phys. J. Plus, 127 4 (2012) 36 Published online: 04 April 2012 DOI: 10.1140/epjp/i2012-12036-8