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Статті в журналах з теми "DNS code in cylindrical coordinates"
SCHUBERT, FRANK, BERND KOEHLER, and ALEXANDER PEIFFER. "TIME DOMAIN MODELING OF AXISYMMETRIC WAVE PROPAGATION IN ISOTROPIC ELASTIC MEDIA WITH CEFIT — CYLINDRICAL ELASTODYNAMIC FINITE INTEGRATION TECHNIQUE." Journal of Computational Acoustics 09, no. 03 (September 2001): 1127–46. http://dx.doi.org/10.1142/s0218396x0100098x.
Повний текст джерелаPiquet, Arthur, Boubakr Zebiri, Abdellah Hadjadj, and Mostafa Safdari Shadloo. "A parallel high-order compressible flows solver with domain decomposition method in the generalized curvilinear coordinates system." International Journal of Numerical Methods for Heat & Fluid Flow 30, no. 1 (June 5, 2019): 2–38. http://dx.doi.org/10.1108/hff-01-2019-0048.
Повний текст джерелаDanielson, K. T., and A. K. Noor. "Finite Elements Developed in Cylindrical Coordinates for Three-Dimensional Tire Analysis." Tire Science and Technology 25, no. 1 (January 1, 1997): 2–28. http://dx.doi.org/10.2346/1.2137529.
Повний текст джерелаTsega, Endalew Getnet. "Numerical Solution of Three-Dimensional Transient Heat Conduction Equation in Cylindrical Coordinates." Journal of Applied Mathematics 2022 (January 4, 2022): 1–8. http://dx.doi.org/10.1155/2022/1993151.
Повний текст джерелаGavrus, Adinel, Daniela Pintilie, and Roxana Nedelcu. "Studies Concerning Numerical Prediction of Metal Fibering Obtained by Cold Bulk Forming Using Sensitivity Analysis of Tribological and Rheological Properties on a Cylindrical Crushing Process." Applied Mechanics and Materials 841 (June 2016): 29–38. http://dx.doi.org/10.4028/www.scientific.net/amm.841.29.
Повний текст джерелаKönies, Axel, Jinjia Cao, Ralf Kleiber, and Joachim Geiger. "A numerical approach to the calculation of the Alfvén continuum in the presence of magnetic islands." Physics of Plasmas 29, no. 9 (September 2022): 092102. http://dx.doi.org/10.1063/5.0102239.
Повний текст джерелаPeponis, Dimitrios V., George P. Latsas, Zisis C. Ioannidis, and Ioannis G. Tigelis. "Dispersion properties of rectangularly‐corrugated waveguide structures by the in‐house 3D FDTD code COCHLEA in cylindrical coordinates." IET Microwaves, Antennas & Propagation 13, no. 1 (October 10, 2018): 28–34. http://dx.doi.org/10.1049/iet-map.2018.5129.
Повний текст джерелаLee, M., and Y. J. Cho. "On the migration of smooth particle hydrodynamic formulation in Cartesian coordinates to the axisymmetric formulation." Journal of Strain Analysis for Engineering Design 46, no. 8 (August 15, 2011): 879–86. http://dx.doi.org/10.1177/0309324711409656.
Повний текст джерелаGlasser, A. H., and S. A. Cohen. "Simulating single-particle dynamics in magnetized plasmas: The RMF code." Review of Scientific Instruments 93, no. 8 (August 1, 2022): 083506. http://dx.doi.org/10.1063/5.0101665.
Повний текст джерелаLuan, Zhaogao, and M. M. Khonsari. "Computational Fluid Dynamics Analysis of Turbulent Flow Within a Mechanical Seal Chamber." Journal of Tribology 129, no. 1 (June 27, 2006): 120–28. http://dx.doi.org/10.1115/1.2401220.
Повний текст джерелаДисертації з теми "DNS code in cylindrical coordinates"
Silano, Gabriella. "Numerical simulations of thermal convection at high Prandtl numbers." Doctoral thesis, Università degli studi di Trieste, 2009. http://hdl.handle.net/10077/3211.
Повний текст джерелаIn this thesis we present the results of an extensive campaign of direct numerical simulations of Rayleigh-B\'enard convection at high Prandtl numbers ($10^{-1}\leq Pr \leq 10^4$) and moderate Rayleigh numbers ($10^{5}\leq Pr \leq 10^9$). The computational domain is a cylindrical cell of aspect-ratio (diameter over cell height) $\Gamma=1/2$, with the no-slip condition imposed to the boundaries. By scaling the results, we find a $1/\sqrt{Pr}$ correction to apply to the free-fall velocity, obtaining a more appropriate representation of the large scale velocity at high $Pr$. We investigate the Nusselt and the Reynolds number dependence on $Ra$ and $Pr$, comparing the results to previous numerical and experimental work. At high $Pr$ the scaling behavior of the Nusselt number with respect to $Ra$ is generally consistent with the power-law exponent $0.309$. The Nusselt number is independent of $Pr$, even at the highest $Ra$ simulated. The Reynolds number scales as $Re\sim \sqrt{Ra}/Pr$, neglecting logarithmic corrections. We analyze the global and local features of viscous and thermal boundary layers and their scaling behavior with respect to Rayleigh and Prandtl numbers, and with respect to Reynolds and Peclet numbers. We find that the flow approaches a saturation regime when Reynolds number decreases below the critical value $Re_s\simeq 40$. The thermal boundary layer thickness turns out to increase slightly even when the Peclet number increases. We explain this behavior as a combined effect of the Peclet number and the viscous boundary layer influences. The range of $Ra$ and $Pr$ simulated contains steady, periodic and turbulent solutions. A rough estimate of the transition from steady to unsteady flow is obtained by monitoring the time-evolution of the system until it reaches stationary solutions ($Ra_U\simeq 7.5 \times 10^6$ at $Pr=10^3$). We find multiple solutions as long-term phenomena at $Ra=10^8$ and $Pr=10^3$ which, however, do not result in significantly different Nusselt number. One of these multiple solutions, even if stable for a long time interval, shows a break in the mid-plane symmetry of the temperature profile. The result is similar to that of some non-Boussinesq effects. We analyze the flow structures through the transitional phases by direct visualizations of the temperature and velocity fields. We also describe how the behavior of the flow structures changes for increasing $Pr$. A wide variety of large-scale circulations and plumes structures are found. The single-roll circulation is characteristic only of the steady and periodic solutions. For other solutions, at lower $Pr$, the mean flow generally consists of two opposite toroidal structures; at higher $Pr$, the flow is organized in multi-cell structures extending mostly in the vertical direction. At high $Pr$, plumes detach from sheet-like structures. The different large-scale-structure signatures are generally reflected in the data trends with respect to $Ra$, but not in those with respect to $Pr$. In particular, the Nusselt number is independent of $Pr$, even when the flow structures appear strongly different varying $Pr$. In order to assess the reliability of the data-set we perform a systematic analysis of the error affecting the data. Refinement grid analysis is extensively applied.
---------------------------------------------------------------------------------------- In questa tesi presentiamo i risultati di un'estensiva campagna di simulazioni numeriche dirette della convezione di Rayleigh-B\'enard ad alti numeri di Prandtl ($10^{-1}\leq Pr \leq 10^4$) e moderati numeri di Rayleigh ($10^{5}\leq Pr \leq 10^9$). Il dominio computazionale \`e una cella cilindrica di allungamento (diametro su altezza cella) $\Gamma=1/2$, con condizioni di non-slittamento ai contorni. Scalando i risultati, troviamo una correzione di $1/\sqrt{Pr}$ da applicare alla velocit\`a di caduta libera, ottenendo una rappresentazione pi\`u appropriata della velocit\`a di larga scala ad elevati $Pr$. Investighiamo la dipendenza del numero di Nusselt e del numero di Reynolds da $Ra$ e $Pr$, comparando i risultati con precedenti lavori numerici e sperimentali. Ad elevati $Pr$ il comportamento di scala del numero di Nusselt rispetto a $Ra$ \`e generalmente compatibile con l'esponente di legge di potenza $0.309$. Il numero di Nusselt \`e indipendente da $Pr$, anche per il pi\`u alto $Ra$ simulato. Il numero di Reynolds scala come $Re\sim \sqrt{Ra}/Pr$, a meno di correzioni logaritmiche. Analizziamo le caratteristiche locali e globali degli strati limite viscosi e termici, ed il loro comportamento di scala rispetto ai numeri Rayleigh e Prandtl, e rispetto ai numeri Reynolds e Peclet. Troviamo che il flusso approccia un regime di saturazione quando il numero di Reynolds scende sotto il valore critico $Re_s\simeq 40$. Lo spessore dello strato limite termico comincia a crescere leggermente anche quando in numero di Peclet aumenta. Spieghiamo questo comportamento come un effetto combinato delle influenze del numero di Peclet e dello strato limite viscoso. L'intervallo di $Ra$ e $Pr$ simulato contiene soluzioni stazionarie, periodiche e turbolente. Una stima approssimata della transizione da flusso stazionario a non stazionario \`e ottenuta monitorando l'evoluzione temporale del sistema fino al raggiungimento di soluzioni stazionarie o statisticamente stazionarie ($Ra_U\simeq 7.5 \times 10^6$ a $Pr=10^3$). Troviamo soluzioni multiple come fenomeni di lungo termine a $Ra=10^8$ e $Pr=10^3$ che, comunque, non comportano differenze significative nel numero di Nusselt. Una di queste soluzioni multiple, anche se stabile per un lungo intervallo di tempo, mostra una rottura della simmetria del profilo di temperatura rispetto al piano mediano. Il risultato \`e simile a quello di alcuni effetti di non-Boussinesq. Analizziamo le strutture del flusso nelle fasi di transizione tramite visualizzazioni dirette dei campi di velocit\`a e temperatura. Descriviamo inoltre come il comportamento delle strutture del flusso cambia al crescere di $Pr$. Un'ampia variet\`a di circolazioni di larga scala e strutture a pennacchio vengono trovate. La circolazione a singolo anello \`e caratteristica solo delle soluzioni stazionarie e periodiche. Per le altre soluzioni, a $Pr$ pi\`u bassi, il flusso medio \`e generalmente composto da due strutture toroidali opposte; a $Pr$ pi\`u alti, il flusso \`e organizzato in strutture multi-cellulari che si estendono maggiormente in direzione verticale. Ad alti $Pr$, pennacchi si staccano da strutture simili a fogli. Le impronte delle differenti strutture di larga scala si riflettono generalmente nell'andamento dei dati rispetto a $Ra$, ma non rispetto a $Pr$. In particolare, il numero di Nusselt \`e indipendente da $Pr$, anche quando le strutture del flusso appaiono molto differenti al variare di $Pr$. Per stabilire l'affidabilit\`a dell'insieme dei dati, effettuiamo un'analisi sistematica degli errori a cui i dati sono soggetti. L'analisi di raffinamento della griglia \`e largamente applicata.
XXI Ciclo
1976
Тези доповідей конференцій з теми "DNS code in cylindrical coordinates"
Homma, Shunji, Haruhisa Honda, Jiro Koga, Shiro Matsumoto, Museok Song, and Gre´tar Tryggvason. "Numerical Simulation of Drop Formation From a Nozzle in Liquid-Liquid Systems." In ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/fedsm2003-45172.
Повний текст джерелаBae, S. W., J. J. Jeong, M. Hwang, and B. D. Chung. "An Implementation and Assessment of the Viscous Stress Model in the MARS Multi-Dimensional Component." In 12th International Conference on Nuclear Engineering. ASMEDC, 2004. http://dx.doi.org/10.1115/icone12-49401.
Повний текст джерелаCrouse, James E., and James M. Sorokes. "An Interactive System to Integrate the Design, Analysis, and Manufacture of Centrifugal Compressor Impellers." In ASME 1990 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1990. http://dx.doi.org/10.1115/90-gt-230.
Повний текст джерелаAbdalla, Aniseh A. A., Jiyang Yu, and Mohammad Alrwashdeh. "Application of Some Turbulence Models to Simulate Buoyancy-Driven Flow." In 2014 22nd International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/icone22-30060.
Повний текст джерелаWang, Zhenhua, Bengt Sunden, Shikui Dong, Zhihong He, Weihua Yang, and Lei Wang. "A Numerical Study of Radiative Heat Transfer in a Cylindrical Furnace by Using Finite Volume Method." In ASME 2016 Heat Transfer Summer Conference collocated with the ASME 2016 Fluids Engineering Division Summer Meeting and the ASME 2016 14th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/ht2016-7095.
Повний текст джерелаAmabili, M. "Comparison of Different Shell Theories for Large-Amplitude Vibrations of Circular Cylindrical Shells." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-32299.
Повний текст джерелаHonda, Haruhisa. "CFD Visualization of Drop Generation From a Nozzle." In ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/fedsm2003-45755.
Повний текст джерелаSubramanian, S. V., R. Bozzola, and Louis A. Povinelli. "Computation of Three-Dimensional, Rotational Flow Through Turbomachinery Blade Rows for Improved Aerodynamic Design Studies." In ASME 1986 International Gas Turbine Conference and Exhibit. American Society of Mechanical Engineers, 1986. http://dx.doi.org/10.1115/86-gt-26.
Повний текст джерелаVijiapurapu, Sowjanya, and Jie Cui. "Large Eddy Simulation of Fully Developed Turbulent Pipe Flow." In ASME 2004 Heat Transfer/Fluids Engineering Summer Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/ht-fed2004-56330.
Повний текст джерелаRaif, Markus, Jürgen F. Mayer, and Heinz Stetter. "Comparison of a TVD-Upwind Scheme and a Central Difference Scheme for Navier-Stokes Turbine Stage Flow Calculation." In ASME 1996 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-gt-031.
Повний текст джерела