Search Results - "Donzis, Diego A."

Small-scale universality in fluid turbulence by Schumacher, Jörg, Scheel, Janet D., Krasnov, Dmitry, Donzis, Diego A., Yakhot, Victor, Sreenivasan, Katepalli R.

“…Turbulent flows in nature and technology possess a range of scales. The largest scales carry the memory of the physical system in which a flow is embedded. One…”
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Direct numerical simulations of turbulent flows using high-order asynchrony-tolerant schemes: Accuracy and performance by Kumari, Komal, Donzis, Diego A.

“…•Stability and conservative properties of Asynchrony-Tolerant (AT) schemes.•Introduce synchronization and communication avoiding algorithms leading to…”
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A generalized von Neumann analysis for multi-level schemes: Stability and spectral accuracy by Kumari, Komal, Donzis, Diego A.

“…•Expose limitations of standard von Neumann analysis.•Develop generalized von Neumann analysis with time-varying amplification factor.•Propose new stability…”
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Laws of turbulence decay from direct numerical simulations by Panickacheril John, John, Donzis, Diego A, Sreenivasan, Katepalli R

“…Inspection of available data on the decay exponent for the kinetic energy of homogeneous and isotropic turbulence (HIT) shows that it varies by as much as…”
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A unified approach for deriving optimal finite differences by Kumari, Komal, Bhattacharya, Raktim, Donzis, Diego A.

“…A unified approach to derive optimal finite differences is presented which combines three critical elements for numerical performance especially for…”
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High-order asynchrony-tolerant finite difference schemes for partial differential equations by Aditya, Konduri, Donzis, Diego A.

“…Synchronizations of processing elements (PEs) in massively parallel simulations, which arise due to communication or load imbalances between PEs, significantly…”
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A unified framework to generate optimized compact finite difference schemes by Deshpande, Vedang M., Bhattacharya, Raktim, Donzis, Diego A.

“…A unified framework to derive optimized compact schemes for a uniform grid is presented. The optimized scheme coefficients are determined analytically by…”
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Asynchronous finite-difference schemes for partial differential equations by Donzis, Diego A., Aditya, Konduri

“…Current trends in massively parallel computing systems suggest that the number of processing elements (PEs) used in simulations will continue to grow over…”
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Regimes of optical propagation through turbulence: theory and direct numerical simulations by Kumari, Komal, Donzis, Diego A.

“…Classical work provides an analytical framework to predict distortions of an electromagnetic wave as it interacts with turbulence. However, there seems to be…”
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Solenoidal Scaling Laws for Compressible Mixing by Panickacheril John, John, Donzis, Diego A, Sreenivasan, Katepalli R

“…Mixing of passive scalars in compressible turbulence does not obey the same classical Reynolds number scaling as its incompressible counterpart. We first show…”
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Compressibility Effects on the Scalar Dissipation Rate by Panickacheril John, John, Donzis, Diego A., Sreenivasan, Katepalli R.

“…Scalar dissipation rate plays an important role in combustion, especially for fast chemistry in non-premixed flames. Even for finite-rate chemistry, it is a…”
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The Batchelor Spectrum for Mixing of Passive Scalars in Isotropic Turbulence: Submitted for the Special Issue Dedicated to S. B. Pope by Donzis, Diego A., Sreenivasan, K. R., Yeung, P. K.

“…We examine the support for the Batchelor spectrum from well-resolved simulations of high-Schmidt-number mixing in isotropic turbulence, and resolve a conundrum…”
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Anomalous exponents in strong turbulence by Yakhot, Victor, Donzis, Diego A.

“…To characterize fluctuations in a turbulent flow, one usually studies different moments of velocity increments and dissipation rate, (v(x+r)−v(x))n¯∝rζn and…”
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Evaluation of finite difference based asynchronous partial differential equations solver for reacting flows by Kumari, Komal, Cleary, Emmet, Desai, Swapnil, Donzis, Diego A., Chen, Jacqueline H., Aditya, Konduri

“…Next-generation exascale machines with extreme levels of parallelism will provide massive computing resources for large scale numerical simulations of complex…”
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Mach number and wall thermal boundary condition effects on near-wall compressible turbulence by Baranwal, Akanksha, Donzis, Diego A, Bowersox, Rodney D. W

“…We investigate the effects of thermal boundary conditions and Mach number on turbulence close to walls. In particular, we study the near-wall asymptotic…”
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Direct Numerical Simulations of turbulent flows using high-order Asynchrony-Tolerant schemes: accuracy and performance by Kumari, Komal, Donzis, Diego A

“…Direct numerical simulations (DNS) are an indispensable tool for understanding the fundamental physics of turbulent flows. Because of their steep increase in…”
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The Batchelor Spectrum for Mixing of Passive Scalars in Isotropic TurbulenceSubmitted for the Special Issue Dedicated to S. B. Pope by Donzis, Diego A, Sreenivasan, K R, Yeung, P K

“…We examine the support for the Batchelor spectrum from well-resolved simulations of high-Schmidt-number mixing in isotropic turbulence, and resolve a conundrum…”
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Anomalous Exponents in Strong Turbulence by Yakhot, Victor, Donzis, Diego A

“…To characterize fluctuations in a turbulent flow, one usually studies different moments of velocity increments and dissipation rate,…”
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Laws of turbulence decay from direct numerical simulations by John, John Panickacheril, Donzis, Diego A, Sreenivasan, Katepalli R

“…Inspection of available data on the decay exponent for the kinetic energy of homogeneous and isotropic turbulence (HIT) shows that it varies by as much as…”
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A Unified Approach for Deriving Optimal Finite Differences by Kumari, Komal, Bhattacharya, Raktim, Donzis, Diego A

“…A unified approach to derive optimal finite differences is presented which combines three critical elements for numerical performance especially for…”
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