TY - JOUR N2 - The nonlinear interaction of wave and non-wave modes in a gas planar flow are considered. Attention is mainly paid to the case when one sound mode is dominant and excites the counter-propagating sound mode and the entropy mode. The modes are determined by links between perturbations of pressure, density, and fluid velocity. This definition follows from the linear conservation equations in the differential form and thermodynamic equations of state. The leading order system of coupling equations for interacting modes is derived. It consists of diffusion inhomogeneous equations. The main aim of this study is to identify the principle features of the interaction and to establish individual contributions of attenuation (mechanical and thermal attenuation) in the solution to the system. L1 - http://www.czasopisma.pan.pl/Content/112817/PDF/aoa.2019.129270.pdf L2 - http://www.czasopisma.pan.pl/Content/112817 PY - 2019 IS - No 3 EP - 559 DO - 10.24425/aoa.2019.129270 KW - nonlinear wave theory KW - nonlinear acoustics KW - coupling dynamic equations KW - Burgers equation KW - diffusion equation A1 - Perelomova, Anna PB - Polish Academy of Sciences, Institute of Fundamental Technological Research, Committee on Acoustics VL - vol. 44 DA - 2019.10.11 T1 - Nonlinear Interaction of Modes in a Planar Flow of a Gas with Viscous and Thermal Attenuation SP - 551 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/112817 T2 - Archives of Acoustics ER -