Results 71 to 80 of about 305,582 (332)

Layer-adapted meshes for convection–diffusion problems

Computer Methods in Applied Mechanics and Engineering, 2003
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An Adaptive Multigrid Strategy for Convection-Diffusion Problems [PDF]

, 2006
*Abstract. *For the solution of convection-diffusion problems we presenta multilevel self-adaptive mesh-refinement algorithm to resolve locallystrong varying behavior, like boundary and interior layers. The methodis based on discontinuous Galerkin (Baumann-Oden DG) discretization.The recursive mesh-adaptation is interwoven with the multigrid solver.The
Vasileva, D., Kuut, A., Hemker, P.W.
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An inverse problem for a quasilinear convection–diffusion equation

Nonlinear Analysis, 2022
We study the inverse problem of recovering a semilinear diffusion term $a(t,λ)$ as well as a quasilinear convection term $\mathcal B(t,x,λ,ξ)$ in a nonlinear parabolic equation $$\partial_tu-\textrm{div}(a(t,u) \nabla u)+\mathcal B(t,x,u,\nabla u)\cdot\nabla u=0, \quad \mbox{in}\ (0,T)\timesΩ,$$ given the knowledge of the flux of the moving quantity ...
Ali Feizmohammadi, Yavar Kian, Gunther Uhlmann   +2 more
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In‐Wheel Piezoelectric DC Power Generator With Zero Resistive Torque

Advanced Science, EarlyView.
In this paper, we present a wheel‐shaped direct‐current piezoelectric generator (DC‐PG) that fundamentally overcomes these constraints by producing phase‐stable DC electricity directly from rolling motion. By embedding this system into suitcase wheels, we demonstrated a fully integrated real‐time location tracking system powered solely by mechanical ...
Hyun Soo Kim, Hyunseok Song, In Woo Oh, Dong‐Gyu Lee, Tae Kyoung Yoon, Jeyeon Lee, Byoung Jin Yoon, So‐Min Song, Iman M. Imani, Seohyun Cho, Seong Jin Kim, Chong‐Yun Kang, Sahn Nahm, Yong Seok Park, Kyung‐Hoon Cho, Jungho Ryu, Jeong Min Baik, Jun Chen, Sunghoon Hur, Hyun‐Cheol Song   +19 more
wiley   +1 more source

Highly Efficient Computational Methods for Two Dimensional Coupled Nonlinear Unsteady Convection-Diffusion Problems

IEEE Access, 2017
In this paper, a numerical solution of 2-D time-dependent coupled nonlinear system is discussed. Both Crank-Nicholson and alternating direction implicit methods were used to address the problems associated with nonlinear system.
Muhammad Saqib, Shahid Hasnain, Daoud Suleiman Mashat   +2 more
doaj   +1 more source

Graphene‐Skinned Alumina Fiber: Continuously Scalable Fabrication and Its Electrothermal Application in Fiber‐Reinforced Polymer Composites

Advanced Science, EarlyView.
Graphene‐skinned alumina fiber (GAF) is a new composite with graphene conformally grown on individual alumina fibers via chemical vapor deposition (CVD). GAF's dynamic, continuous and scalable production is achieved by using a home‐made roll‐to‐roll (RTR) CVD system featuring integrated degumming and growth chambers. GAF possesses tunable conductivity,
Xiaobai Wang, Wenjing Jiang, Jingnan Wang, Yuejie Zhao, Enshan Liu, Fushun Liang, Yixin Zhang, Qingqing Liu, Kangyi Zheng, Yuyao Yang, Fan Yang, Xiao Jiang, Yue Qi, Zhongfan Liu   +13 more
wiley   +1 more source

Singularly Perturbed Problems Modeling Reaction-convection-diffusion Processes

Computational Methods in Applied Mathematics, 2003
AbstractIn this paper, parameter - uniform numerical methods for singularly perturbed ordinary differential equations containing two small parameters are studied.Parameter-explicit theoretical bounds on the derivatives of the solutions are derived. A numerical algorithm based on an upwind finite difference operator and an appropriate piecewise uniform ...
O'Riordan, Eugene, Pickett, Maria L., Shishkin, Grigorii I.   +2 more
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Eulerian-Lagrangian analysis of pollutant transport in shallow water [PDF]

, 1984
A numerical method for the solution of the two-dimensional, unsteady, transport equation is formulated, and its accuracy is tested.The method uses a Eulerian-Lagrangian approach, in which the transport equation is divided into a diffusion equation ...
Adams, E. Eric, Baptista, Antonio E. de M., Stolzenbach, Keith D.   +2 more
core  

Safety of Sodium‐Ion Batteries: Evaluation and Perspective from Component Materials to Cells, Modules, and Packs

Advanced Energy Materials, EarlyView.
This review provides a bottom‐up evaluation of sodium‐ion battery safety, linking material degradation mechanisms, cell engineering parameters, and module/pack assembly. It emphasizes that understanding intrinsic material stability and establishing coordinated engineering control across hierarchical levels are vital for preventing degradation coupling ...
Won‐Gwang Lim, Seoa Kim, Erik A. Wu, Darren H. S. Tan, Shawn Peng, Xiaolin Li   +5 more
wiley   +1 more source

A Computational Technique for Solving Singularly Perturbed Delay Partial Differential Equations

Foundations of Computing and Decision Sciences, 2021
In this work, a matrix method based on Laguerre series to solve singularly perturbed second order delay parabolic convection-diffusion and reaction-diffusion type problems involving boundary and initial conditions is introduced.
Gürbüz Burcu
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