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Theory and simulation of shock waves: Entropy production and energy conversion
(Journal article; Peer reviewed, 2021)We have considered a shock wave as a surface of discontinuity and computed the entropy production using nonequilibrium thermodynamics for surfaces. The results from this method, which we call the “Gibbs excess method” ... -
The thermal boundary resistance at semiconductor interfaces: a critical appraisal of the Onsager vs. Kapitza formalisms
(Journal article; Peer reviewed, 2018)We critically readdress the definition of thermal boundary resistance at an interface between two semiconductors. By means of atomistic simulations we provide evidence that the widely used Kapitza formalism predicts thermal ... -
Thermal conductivity and internal temperature profiles of Li-ion secondary batteries
(Journal article, 2017)In this paper we report the thermal conductivity for several battery components. Materials were obtained from several electrode- and separator suppliers, and some were extracted from commercial batteries. We measured with ... -
Thermal conductivity and temperature profiles in carbon electrodes for supercapacitors
(Journal article, 2014)The thermal conductivity of supercapacitor film electrodes composed of activated carbon (AC), AC with 15 mass% multi-walled carbon nanotubes (MWCNTs), AC with 15 mass% onion-like carbon (OLC), and only OLC, all mixed with ... -
Thermal conductivity of carbon dioxide from non-equilibrium molecular dynamics: a systematic study of several common force fields
(Journal article; Peer reviewed, 2014)We report a systematic investigation of the thermal conductivity of various three-site models of carbon dioxide (CO2) using nonequilibrium molecular dynamics in the temperature range 300–1000 K and for pressures up to 200 ... -
Thermal Conductivity of Molten Carbonates with Dispersed Solid Oxide from Differential Scanning Calorimetry
(Journal article; Peer reviewed, 2019)Recently, there has been a noticeable increase in the applications of composite mixtures containing molten salt and solid oxide for thermal energy conversion and storage systems. This highlights that thermal conductivity ... -
Thermal Conductivity, Heat Sources and Temperature Profiles of Li-ion Batteries
(Journal article; Peer reviewed, 2014)In this paper we report the thermal conductivity of several commercial and non-commercial Li-ion secondary battery electrode materials with and without electrolytesolvents. We also measure the Tafel potential, the ohmic ... -
The thermal diffusion coefficient of membrane-electrode assemblies relevant to polymer electrolyte membrane fuel cells
(Peer reviewed; Journal article, 2022)This study focuses on the role of the combined gas diffusion layer and membrane on thermal diffusion coefficient and its effects on water transport in polymer electrolyte membrane fuel cell. Thermal diffusion coefficients ... -
Thermal Driving Forces Across Membrane Systems: Energy Conversion and Water Purification
(Doctoral theses at NTNU;2024:223, Doctoral thesis, 2024)Among the energy sources used to fuel our modern industrialized society, industrial waste heat is among the most abundant and untapped. Wherever energy conversion from high-grade sources occurs, a fraction of this energy ... -
Thermal modeling of the respiratory turbinates in arctic and subtropical seals
(Peer reviewed; Journal article, 2023)Mammals possess complex structures in their nasal cavities known as respiratory turbinate bones, which help the animal to conserve body heat and water during respiratory gas exchange. We considered the function of the ... -
Thermal transport in polyethylene: The effect of force fields and crystallinity
(Peer reviewed; Journal article, 2021)In this article, we study the local structure and heat transfer properties (thermal conductivity and interfacial conductance) in model semi-crystalline Polyethylene (PE) by non-equilibrium molecular dynamics. We compare ... -
Thermo-molecular orientation effects in fluids of dipolar dumbbells
(Journal article, 2014)We use molecular dynamics simulations in applied thermal gradients to study thermomolecular orientation (TMO) of size-asymmetric dipolar dumbbells with different molecular dipole moments. We find that the direction of the ... -
Thermo-osmosis in membrane systems: a review
(Journal article; Peer reviewed, 2017)We give a first review of experimental results for a phenomenon little explored in the literature, namely thermal osmosis or thermo-osmosis. Such systems are now getting increased attention because of their ability to use ... -
Thermo-osmotic pressure and resistance to mass transport in a vapor-gap membrane
(Peer reviewed; Journal article, 2021)We have investigated the transport of fluid through a vapor-gap membrane. The transport due to a membrane temperature difference was investigated under isobaric as well as non-isobaric conditions. Such a concept is relevant ... -
Thermodynamic Characterization Of Two Layers Of CO2 On A Graphite Surface
(Journal article; Peer reviewed, 2014)We find by examination of density profiles that carbon dioxide adsorbs on graphite in two distinct layers. We report the activity coefficient, entropy and enthalpy for CO2 in each layer using a convenient computational ... -
Thermodynamic Properties of Hydrogen Dissociation Reaction from the Small System Method and Reactive Force Field ReaxFF
(Journal article, 2017)We present thermodynamic properties of the H2 dissociation reaction by means of the Small System Method (SSM) using Reactive Force Field (ReaxFF) simulations. Thermodynamic correction factors, partial molar enthalpies and ... -
Thermodynamic properties of the 3D Lennard-Jones/spline model
(Peer reviewed; Journal article, 2019)In the Lennard-Jones spline (LJ/s) model, the Lennard-Jones (LJ) potential is truncated and splined so that both the pair potential and the force continuously approach zero at rc ≈ 1.74σ. It exhibits the same structural ... -
Thermodynamically consistent modeling of gas flow and adsorption in porous media
(Journal article; Peer reviewed, 2024)In modeling of gas flow through porous media width adsorption, the thermodynamic properties of the adsorbed phase are usually approximated by those of the bulk liquid. Using non-isothermal, gaseous transport of moist air ... -
Thermoelectric Phenomena in Lithium Ion Batteries and Thermogalvanic Cells
(Doctoral theses at NTNU;2023:308, Doctoral thesis, 2023)Electrochemical cells are central in the shift towards green energy sources. Lithium-ion batteries have rapidly become one of the world’s leading energy storage technologies. Thermogalvanic cells can be used to convert ... -
Thermoelectric Power of Ion Exchange Membrane Cells Relevant to Reverse Electrodialysis Plants
(Journal article; Peer reviewed, 2019)A thermoelectric cell is designed and experiments are carried out in order to measure Seebeck coefficients of ion exchange membranes at different constant concentrations of NaCl in water. The purpose of the investigation ...