TY - JOUR
T1 - Thermal rectification in mass-graded next-nearest-neighbor Fermi-Pasta-Ulam lattices
AU - Romero-Bastida, M.
AU - Miranda-Peña, Jorge Orlando
AU - López, Juan M.
N1 - Publisher Copyright:
© 2017 American Physical Society.
PY - 2017/3/30
Y1 - 2017/3/30
N2 - We study the thermal rectification efficiency, i.e., quantification of asymmetric heat flow, of a one-dimensional mass-graded anharmonic oscillator Fermi-Pasta-Ulam lattice both with nearest-neighbor (NN) and next-nearest-neighbor (NNN) interactions. The system presents a maximum rectification efficiency for a very precise value of the parameter that controls the coupling strength of the NNN interactions, which also optimizes the rectification figure when its dependence on mass asymmetry and temperature differences is considered. The origin of the enhanced rectification is the asymmetric local heat flow response as the heat reservoirs are swapped when a finely tuned NNN contribution is taken into account. A simple theoretical analysis gives an estimate of the optimal NNN coupling in excellent agreement with our simulation results.
AB - We study the thermal rectification efficiency, i.e., quantification of asymmetric heat flow, of a one-dimensional mass-graded anharmonic oscillator Fermi-Pasta-Ulam lattice both with nearest-neighbor (NN) and next-nearest-neighbor (NNN) interactions. The system presents a maximum rectification efficiency for a very precise value of the parameter that controls the coupling strength of the NNN interactions, which also optimizes the rectification figure when its dependence on mass asymmetry and temperature differences is considered. The origin of the enhanced rectification is the asymmetric local heat flow response as the heat reservoirs are swapped when a finely tuned NNN contribution is taken into account. A simple theoretical analysis gives an estimate of the optimal NNN coupling in excellent agreement with our simulation results.
UR - http://www.scopus.com/inward/record.url?scp=85016466306&partnerID=8YFLogxK
U2 - 10.1103/PhysRevE.95.032146
DO - 10.1103/PhysRevE.95.032146
M3 - Artículo
C2 - 28415322
SN - 2470-0045
VL - 95
JO - Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
JF - Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
IS - 3
M1 - 032146
ER -