Results 41 to 50 of about 365,066 (339)

Stagnation–saddle points and flow patterns in Stokes flow between contra-rotating cylinders [PDF]

, 1998
The steady flow is considered of a Newtonian fluid, of viscosity mu, between contra-rotating cylinders with peripheral speeds U-1 and U-2 The two-dimensional velocity field is determined correct to O(H-0/2R)(1/2), where 2H(0) is the minimum separation of
Gaskell, P.H., Savage, M.D., Thompson, H.M.   +2 more
core   +1 more source

Complete stagnation of gmres

Linear Algebra and its Applications, 2003
In their introduction, the authors state, ``We study an oddity: the class of problems for which the generalized minimal residual (GMRES) algorithm, when started with the initial guess \(x^{(0)}=0\) and using exact arithmetic, computes \(m\) iterates \(x^{(1)}=\cdots=x^{(m)}=0\) without making any progress at all.
Dianne P. O'Leary, Ilya Zavorin, Howard C. Elman   +2 more
openaire   +3 more sources

A Standard-Based Method to Simulate the Behavior of Thermal Solar Systems with a Stratified Storage Tank

Energies, 2020
Thermal solar systems are interesting solutions to reduce CO 2 emissions and gradually promote the use of renewable sources. However, sizing such systems and analysing their behavior are still challenging issues, especially for the trade-off ...
Edoardo Alessio Piana, Benedetta Grassi, Laurent Socal   +2 more
doaj   +1 more source

MOOCs: Innovation or Stagnation?

Turkish Online Journal of Distance Education, 2018
Issues of the phenomenon of Massive Open Online Course (MOOC) and its integration into current online and campus education to enhance higher education quality in universities is gaining importance. This large scale form of online education has the potential to escalate the reputations of universities and increase the global access to their institutions.
Pilli, O., Admiraal, W.F., Salli, A.
openaire   +5 more sources

A Simulative Approach for the Prediction of Mesoscale Residual Stress Fields in Solution‐Strengthened Ferritic Ductile Iron

Advanced Engineering Materials, EarlyView.
This study presents a 3D representative volume element‐based simulation approach to predict mesoscopic residual stress and strain fields in silicon solid solution‐strengthened ductile cast iron. By modeling phase transformation kinetics with an enhanced Johnson–Mehl–Avrami–Kolmogorov model, the effects of varying cooling rates on residual stresses are ...
Lutz Horbach, Oliver Schenk, Valérian Iss, Ali Rajaei, Jiali Zhang, Felix Weber, Christoph Broeckmann   +6 more
wiley   +1 more source

Pathways to Prosperity: Navigating Post-Stagnation Growth and Revitalizing Business

Economies
This study examines the ways in which firms recover from stagnation or sales decline, with a focus on two key aspects: traditional high-growth companies and growth restarts within the framework of organizational life cycle theory.
Vladislav Spitsin, Darko B. Vuković, Marina Ryzhkova, Victoria Leonova   +3 more
doaj   +1 more source

The Structural Refinement of Commercial‐Purity Copper Processed by Equal Channel Angular Pressing with Low Strain Amplitude

Advanced Engineering Materials, EarlyView.
Equal channel angular pressing of commercial pure copper under low strain amplitude (≈0.48) induces concurrent continuous and localized discontinuous dynamic recrystallization, forming a duplex structure influenced by strain heterogeneity and recovery. Moderate hardening after 4–12 passes results from progressive high‐angle grain boundary formation via
Paula Cibely Alves Flausino, Nayara A. N. da Silva, Bárbara C. de Almeida, Taise M. Manhabosco, Elaine C. S. Corrêa, Maria T. P. Aguilar, Paulo R. Cetlin   +6 more
wiley   +1 more source

Innovation Stagnation in Polish Industry?

Gospodarka Narodowa. The Polish Journal of Economics, 2021
The subject of research in this paper is the development of innovativeness in Polish industry from 2006 to 2017. The paper’s basic aim is to evaluate the level of innovativeness in Polish industry during this period amid the inflow of European Union ...
Andrzej H. Jasiński
doaj   +1 more source

One-dimensional radiation-hydrodynamic simulations of imploding spherical plasma liners with detailed equation-of-state modeling

, 2012
This work extends the one-dimensional radiation-hydrodynamic imploding spherical argon plasma liner simulations of T. J. Awe et al. [Phys. Plasmas 18, 072705 (2011)] by using a detailed tabular equation-of-state (EOS) model, whereas Awe et al.
Cassibry, J. T., Davis, J. S., Golovkin, I. E., Hsu, S. C., MacFarlane, J. J.   +4 more
core   +1 more source

Direct numerical simulation of heat transfer from the stagnation region of a heated cylinder affected by an impinging wake [PDF]

, 2011
Copyright © 2011 Cambridge University Press.The effect of an incoming wake on the flow around and heat transfer from the stagnation region of a circular cylinder was studied using direct numerical simulations (DNSs).
JAN G. WISSINK, Sikmanovic, van Fossen, WOLFGANG RODI, Yardi   +4 more
core   +1 more source