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Thermoelectric energy harvesters can have a much higher conversion efficiency by implementing quantum dots/wells between the high temperature region and the low temperature region. However they still suffer a limitation of the maximum…

介观与纳米尺度物理 · 物理学 2015-06-30 Lijie Li

General relativistic magnetohydrodynamic (GRMHD) flows along magnetic fields threading a black hole can be divided into inflow and outflow parts, according to the result of the competition between the black hole gravity and…

高能天体物理现象 · 物理学 2015-06-23 Hung-Yi Pu , Masanori Nakamura , Kouichi Hirotani , Yosuke Mizuno , Kinwah Wu , Keiichi Asada

We introduce Gradient Particle Magnetohydrodynamics (GPM), a new Lagrangian method for magnetohydrodynamics based on gradients corrected for the locally disordered particle distribution. The development of a numerical code for MHD…

天体物理学 · 物理学 2009-11-06 Jason L. Maron , Gregory G. Howes

Harvesting waste heat with temperatures lower than 100 oC can improve system efficiency and reduce greenhouse gas emissions, yet it has been a longstanding and challenging task. Electrochemical methods for harvesting low-grade heat have…

应用物理 · 物理学 2021-11-03 Xin Qian , Jungwoo Shin , Yaodong Tu , James Han Zhang , Gang Chen

Molecular dynamics (MD) simulations play an important role in understanding and engineering heat transport properties of complex materials. An essential requirement for reliably predicting heat transport properties is the use of accurate…

Liquid metal batteries (LMBs) are a promising grid-scale storage device however, the scalability of this technology and its electrochemical performance is limited by mass transport overpotentials. In this work, a numerical model of a…

流体动力学 · 物理学 2024-10-15 Declan Finn Keogh , Mark Baldry , Victoria Timchenko , John Reizes , Chris Menictas

The controversy concerning the temperature correction to the Casimir force has been ongoing for almost a decade with no view to a solution and has recently been extended to include semiconducting materials. We review some theoretical…

量子物理 · 物理学 2015-05-13 Simen A. Ådnøy Ellingsen , Iver Brevik , Johan S. Høye , Kimball A. Milton

This paper presents a modeling and optimization framework to minimize the energy consumption of a fully electric powertrain by optimizing its design and control strategies whilst explicitly accounting for the thermal behavior of the…

系统与控制 · 电气工程与系统科学 2022-04-13 Mouleeswar Konda , Theo Hofman , Mauro Salazar

Long-time high-resolution simulations of the dynamics of a coronal loop in cartesian geometry are carried out, within the framework of reduced magnetohydrodynamics (RMHD), to understand coronal heating driven by motion of field lines…

天体物理学 · 物理学 2008-11-26 A. F. Rappazzo , M. Velli , G. Einaudi , R. B. Dahlburg

Increased distributed Photo-Voltaic (PV) generation leads to an increase in voltages and unwarranted backflows into the grid. This paper investigates Demand Response (DR) with Electric Water Heaters (EWHs) as a way to increase the PV…

系统与控制 · 计算机科学 2014-08-08 Xiangkun Li , Theodor Borsche , Göran Andersson

Relativistic magnetic reconnection is thought to power various multi-wavelength emission signatures from neutron stars and black holes. Relativistic resistive magnetohydrodynamics (RRMHD) offers the simplest model of reconnection. However,…

高能天体物理现象 · 物理学 2026-01-07 B. Ripperda , M. P. Grehan , A. Moran , S. Selvi , L. Sironi , A. Philippov , A. Bransgrove , O. Porth

We present strategies based upon extremization principles, in the case of the axisymmetric equations of magnetohydrodynamics (MHD). We study the equilibrium shape by using a minimum energy principle under the constraints of the MHD…

流体动力学 · 物理学 2007-05-23 Nicolas Leprovost , Pierre-Henri Chavanis , Berengere Dubrulle

As wearable electronics become increasingly prevalent, there is a rise in interest and demand for sustainably designed systems that are also energy self-sufficient. The research described in this paper investigated a shoe-worn energy…

系统与控制 · 电气工程与系统科学 2025-07-23 Weijia Peng , Mingtong Chen , Zhengbao Yang

Magnetohydrodynamic (MHD) ships represent a clear demonstration of the Lorentz force in fluids, which explains the number of students practicals or exercises described on the web. However, the related literature is rather specific and no…

The work presented in this article describes thermoelectric effect in hollow blocks for heat waste harvesting purposes. The study consists of developing a numerical model formed by a heat transfer equation coupled to thermoelectric effects…

材料科学 · 物理学 2021-08-17 M. Wehbe , J. Dgheim , E. Sassine

Self-heating is a severe problem for high-power GaN electronic and optoelectronic devices. Various thermal management solutions, e.g. flip-chip bonding or composite substrates have been attempted. However, temperature rise still limits…

材料科学 · 物理学 2015-06-04 Zhong Yan , Guanxiong Liu , Javed M. Khan , Alexander A. Balandin

This paper presents a comprehensive analysis of Magnetoplasmadynamic Thrusters (MPDT), examining their working principles, performance characteristics, and potential applications in space propulsion. The study focuses on both self-field and…

等离子体物理 · 物理学 2024-12-31 Egemen Gover

The transport of waves and turbulence beyond the photosphere is central to the coronal heating problem. Turbulence in the quiet solar corona has been modeled on the basis of the nearly incompressible magnetohydrodynamic (NI MHD) theory to…

太阳与恒星天体物理 · 物理学 2023-01-12 Mehmet Sarp Yalim , Gary P. Zank , Mahboubeh Asgari-Targhi

Ceramics based piezoelectric generators are known for their high energy density and poor flexibility. In this work, v_r-PMN-0.3PT/PDMS 2-2 composite with optimum PMN-0.3PT content (v_r) was designed that demonstrated enhanced output energy…

应用物理 · 物理学 2024-01-12 Abhishek Kumar , Kaushik Das , Amritendu Roy

Heat pipe is one of the most efficient tools for heat dissipation in electronics and power systems. Currently, heat pipes are usually made of copper, aluminum or stainless steel. Due to their relatively high density and limited heat…

应用物理 · 物理学 2020-02-27 Ya Liu , Shujing Chen , Yifeng Fu , Nan wang , Davide Mencarelli , Luca Pierantoni , Hongbin Lu , Johan Liu