Comparing Ranque tubes of circular and square cross section Ivan K. Kabardin, Vladimir G. Meledin, Nikolay I. Yavorsky, Vladimir A. Pavlov, Margarita Kh. Pravdina, Dmitry V. Kulikov and Valentina I. Polyakova MATEC Web Conf., 115 (2017) 02022 Published online: 10 July 2017 DOI: 10.1051/matecconf/201711502022