A molecular dynamics simulation is created to predict the thermal conductivity of a (7,7) single wall carbon nanotube filled with a copper nanowire for lengths ranging from 9.957 nm to 63.091 nm. In the simulations, a temperature difference is created using Nose-Hoover thermostats at the two ends with 320 K and 280 K. The thermal conductivity of the carbon nanotube-copper nanowire nanostructure is calculated to be 24% higher than that of a corresponding pure single wall carbon nanotube and estimated to be 40% lower than that of a pure copper nanowire. (C) 2013 Elsevier Ltd. All rights reserved.