(kinematics) thermal_expansion thermal_expansion11 9.5e-6 thermal_expansion22 9.5e-6 thermal_expansion33 5.6e-6 (source) thermal_externalheat externalheat_time 0 500 500.001 1000 # 500 secs supplying 1 Watt, then removing 1 Watt externalheat_rate 1 1 -1 -1