Method and device for producing snow

A method for producing substantially dendritic snow, comprising the following steps:

• a) supplying a flow of humid air and a flow of cold air into a substantially closed space in order to mix the two air flows therein and to form an atmosphere supersaturated with water within the substantially closed space;
• b) forming ice crystals including ice crystal nuclei and allowing snowflakes to grow from the supersaturated atmosphere depositing onto surfaces of the ice crystal nuclei and then onto surfaces of the growing snowflakes within the substantially closed space while keeping the ice crystals and growing snowflakes within the substantially closed space in a floating condition and allowing them to grow for a predetermined period of time sufficient to obtain snowflakes of a predefined size;
• wherein the floating condition is achieved by moving the ice crystals and growing snowflakes, on average, along a substantially helical trajectory by the air flows, which results in the snowflakes being distributed according to their size along the substantially helical trajectory;
• and
• c) releasing substantially dendritic snowflakes having the predefined size after the predetermined period of time by a carrier air flow through a release opening of the substantially closed space.