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Aircraft icing is the process of changing the state of concentration of water contained in the air in theform of steam into a solid form accumulating on the surface of aircraft construction elements duringa flight or results from the direct accumulating of ice crystals on the aircraft surface. The process ofaircraft icing is complex and depends on many variable factors related to atmospheric conditions andaircraft flight parameters. The goal of work is to develop a deterministic model for identifying thebeginning of the icing process depending on the aircraft flight parameters on the basis of CFDsimulations.Aircraft icing is the process of changing the state of concentration of water contained in the air in theform of steam into a solid form accumulating on the surface of aircraft construction elements duringa flight or results from the direct accumulating of ice crystals on the aircraft surface. The process ofaircraft icing is complex and depends on many variable factors related to atmospheric conditions andaircraft flight parameters. The goal of work is to develop a deterministic model for identifying thebeginning of the icing process depending on the aircraft flight parameters on the basis of CFDsimulations.