Advancements in Application of Scientific Computing and Numerical Analysis

A special issue of Mathematics (ISSN 2227-7390). This special issue belongs to the section "E: Applied Mathematics".

Deadline for manuscript submissions: 28 February 2027 | Viewed by 1531

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Guest Editor
Department of Mathematics, The Pennsylvania State University, Abington, PA 19001, USA
Interests: computational mathematics; sensitivity equation methods; ordinary and partial differential equations; numerical analysis; scientific computing

Special Issue Information

Dear Colleagues,

This special issue is dedicated to applications in scientific computing and numerical analysis ranging from high-performance numerical algorithms to large-scale computational problems and the development of such methods utilizing ordinary and partial differential equations, optimization, linear algebra, and any mathematical technique that underlies these types of computations. The analysis of numerical methods in a diverse range of problems arising from science and engineering are among the topics covered in this issue.

In this Special Issue, we invite high-quality research papers on new advances in scientific computing and numerical analysis. We welcome contributions of original research articles as well as review articles that aim to advance computational methodologies and their applications.

Prof. Dr. Faranak Courtney-Pahlevani
Guest Editor

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Keywords

  • numerical analysis
  • scientific computing
  • numerical algorithms
  • numerical methods in ODE and PDE
  • optimization
  • interpolation

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Published Papers (2 papers)

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Research

24 pages, 979 KB  
Article
Early Prediction of Convergence Outcomes in Parameterized Root-Finding: A Feature-Based Study
by Bruno Carpentieri, Andrei Velichko, Mudassir Shams and Paola Lecca
Mathematics 2026, 14(12), 2036; https://doi.org/10.3390/math14122036 - 7 Jun 2026
Viewed by 297
Abstract
We study early prediction of convergence outcomes in parameterized root-finding problems. The analysis focuses on whether short prefixes of solver trajectories contain useful information about convergence within prescribed iteration horizons, without modifying the underlying numerical scheme. To avoid relying on profile-derived targets, we [...] Read more.
We study early prediction of convergence outcomes in parameterized root-finding problems. The analysis focuses on whether short prefixes of solver trajectories contain useful information about convergence within prescribed iteration horizons, without modifying the underlying numerical scheme. To avoid relying on profile-derived targets, we use solver-level success fractions Y20, Y50, and Y100, defined as the fractions of trajectories that satisfy the convergence criterion within 20, 50, and 100 iterations, respectively. Within this setting, we compare several families of early solver-derived features, including residual-based, step-based, and trajectory-derived quantities. We also distinguish between direct-prefix predictors, which use the first N values of a feature family, and scalar summary predictors, in which the same prefix is compressed into a single descriptor. Numerical experiments on controlled parameterized root-finding benchmarks show that simple residual- and step-based summaries provide the strongest within-base predictors among the tested feature families. In particular, mean and median log residual and log step summaries are informative even at short prefixes. More elaborate trajectory-derived descriptors, including the kNN–LLE proxy, are less effective as standalone predictors in the present experiments. The results also show that prediction difficulty depends strongly on the benchmark structure: Dataset 1 leads to near-saturated prediction performance at very short prefixes, whereas the oscillatory Dataset 2A provides a more challenging and discriminative case. In this latter setting, compact scalar summaries at N=10 can occasionally match or slightly outperform the corresponding full-prefix predictors, suggesting that scalar compression may suppress part of the transient variability present in the full-prefix representation. Cross-base transfer is substantially more difficult than within-base prediction, indicating that the observed predictive relationships are not uniformly portable across the considered benchmark problems. Overall, the study suggests that, in controlled parameterized settings of the type examined here, convergence outcomes can often be predicted from simple and computationally inexpensive early trajectory summaries. The results should be interpreted as a feature-based early convergence outcome prediction study, rather than as a general diagnostic methodology for nonlinear solvers. Full article
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16 pages, 308 KB  
Article
On the Energy Dissipation Rate of Ensemble Eddy Viscosity Models of Turbulence: Shear Flows
by William Layton
Mathematics 2026, 14(8), 1319; https://doi.org/10.3390/math14081319 - 15 Apr 2026
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Abstract
Classical eddy viscosity models add a viscosity term with a turbulent viscosity coefficient developed beginning with the Kolmogorov–Prandtl parameterization. Approximations of unknown accuracy of the unknown mixing lengths and turbulent kinetic energy are typically constructed by solving associated systems of nonlinear convection–diffusion-reaction equations [...] Read more.
Classical eddy viscosity models add a viscosity term with a turbulent viscosity coefficient developed beginning with the Kolmogorov–Prandtl parameterization. Approximations of unknown accuracy of the unknown mixing lengths and turbulent kinetic energy are typically constructed by solving associated systems of nonlinear convection–diffusion-reaction equations with nonlinear boundary conditions. These often over-diffuse, so additional fixes are added such as wall laws, or different approximations are used in different regions (which must also be specified). Alternately, one can solve an ensemble of NSEs with perturbed data, compute the ensemble mean and fluctuation, and simply directly compute the turbulent viscosity parameterization. This idea is recent. From previous work it seems to be of a lower complexity and greater accuracy. It also produces parameterizations with the correct near-wall asymptotic behavior. The question then arises: Does this ensemble eddy viscosity approach over-diffuse solutions? This question is addressed herein. Full article
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