In this paper, thermoelastic problem of onedimensional copper rod under thermal shock is simulated using molecular dynamics method by adopting embedded atom method potential. The rod is on axis x, the left outermost s...In this paper, thermoelastic problem of onedimensional copper rod under thermal shock is simulated using molecular dynamics method by adopting embedded atom method potential. The rod is on axis x, the left outermost surface of which is traction free and the right outermost surface is fixed. Free boundary condition is imposed on the outermost surfaces in direction y and z. The left and right ends of the rod are subjected to hot and cold baths, respectively. Temperature, displacement and stress distributions are obtained along the rod at different moments, which are shown to be limited in the mobile region, indicating that the heat propagation speed is limited rather than infinite. This is consistent with the prediction given by generalized thermoelastic theory. From simulation results we find that the speed of heat conduction is the same as the speed of thermal stress wave. In the present paper, the simulations are conducted using the large-scale atomic/molecular massively parallel simulator and completed visualization software.展开更多
In this paper we present a software package based on modern information technologies that allows rapid analysis and visualization of the properties of complex plasmas.The properties of plasma are simulated by two mean...In this paper we present a software package based on modern information technologies that allows rapid analysis and visualization of the properties of complex plasmas.The properties of plasma are simulated by two means.First of all,we have applied the molecular dynamics simulation method which numerically solves the equations of motions for plasma particles.Secondly,we calculate microscopic properties of plasma by using the Boltzmann equation with additional relations,initial and boundary conditions.展开更多
基金supported by the National Natural Science Foundation of China (10872158)
文摘In this paper, thermoelastic problem of onedimensional copper rod under thermal shock is simulated using molecular dynamics method by adopting embedded atom method potential. The rod is on axis x, the left outermost surface of which is traction free and the right outermost surface is fixed. Free boundary condition is imposed on the outermost surfaces in direction y and z. The left and right ends of the rod are subjected to hot and cold baths, respectively. Temperature, displacement and stress distributions are obtained along the rod at different moments, which are shown to be limited in the mobile region, indicating that the heat propagation speed is limited rather than infinite. This is consistent with the prediction given by generalized thermoelastic theory. From simulation results we find that the speed of heat conduction is the same as the speed of thermal stress wave. In the present paper, the simulations are conducted using the large-scale atomic/molecular massively parallel simulator and completed visualization software.
基金supported by the Ministry of Education and Science of the Republic of Kazakhstan under grants 1415/GF(IPS-21),1102/GF(ITT-5).
文摘In this paper we present a software package based on modern information technologies that allows rapid analysis and visualization of the properties of complex plasmas.The properties of plasma are simulated by two means.First of all,we have applied the molecular dynamics simulation method which numerically solves the equations of motions for plasma particles.Secondly,we calculate microscopic properties of plasma by using the Boltzmann equation with additional relations,initial and boundary conditions.
