@article{Sirvydas_2010 author = {Arunas Sirvydas and Robertas Poskas}, title = {Numerical Investigations of Opposing Mixed Convection Heat Transfer in Vertical Flat Channel. 1. Laminar Mixed Convection and Transition to Vortex Flow in the Case of Symmetrical Heating}, journal = {Heat Transfer Research}, issn = {1064-2285}, year = {2010}, volume = {41}, number = {5}, pages = {509--520} }