The transition of gas,liquid and solid for substance is a natural phenomenon,which is usually described by Physical Vapor Transport(PVT)system.The existence and regularity of solutions for the initial-boundary value problem to PVT system are studied in this paper.Firstly,the existence for the solutions of PVT system is obtained by verifying the weak continuous of an operator introduced with variational structure combining with the functional estimate.Secondly,the uniqueness of the solutions to PVT system is proved by using the energy method and the Gronwall inequality.Finally,the regularity of the solutions for PVT system is improved by the ADN theory.
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