Trends of the formation of methane dangerous concentrations in the areas of local deceleration of methane-air flow.

 E. Kolesnichenko, V. Artemiev, I. Kolesnichenko, E. Lyubomishchenko

Physics are discussed of the formation of shock waves in boundary layers of the methane-air flow when it passes the obstacles. Under Boyle-Mariotte law the deceleration of methane-air flow in such areas causes a several-time increase of methane concentrations.