Registered Data

[CT157]

  • Session Time & Room
    • CT157 (1/1) : 3C @D408 [Chair: Neil Budko]
  • Classification
    • CT157 (1/1) : Other natural sciences (mathematical treatment) (92F) / Geophysics (86A) / Basic methods in fluid mechanics (76M)

[02635] Application of mathematics in large-scale agriculture projects

  • Session Time & Room : 3C (Aug.23, 13:20-15:00) @D408
  • Type : Industrial Contributed Talk
  • Abstract : Two large-scale projects, each involving a consorcium of breeding, growing and processing companies from potato industry in the Netherlands will be described, with the emphasis on the increasingly important role the mathematics is playing in these projects. Applied mathematics is required at the three major stages: design of experiments, data pre-processing, and association-regression studies. Successes and current challenges will be discussed.
  • Classification : 92F05, 65Z05, 62J02, 62J05, 62J07, mathematics for agriculture
  • Format : Talk at Waseda University
  • Author(s) :
    • Neil Budko (Delft University of Technology)

[02389] Exploring the excess of cloud condensation nuclei and rain suppression using a minimal 3D Boussinesq model with bulk cloud microphysics

  • Session Time & Room : 3C (Aug.23, 13:20-15:00) @D408
  • Type : Contributed Talk
  • Abstract : For many decades the hypothesis that an increase in air pollution could affect the rain formation processes has been discussed with theoretical, experimental, and numerical arguments. Several studies have shown that higher pollutant concentrations can inhibit, decrease or increase precipitation. Differences between results arise partly from the complexity of the problem, which requires the consideration of processes at multiple scales. This study aims to provide a very simple numerical model that satisfactorily represents the atmospheric dynamics and cloud microphysics to explore the effect of pollution on rain formation. We adapted and extended a previously existing three-dimensional minimal model consisting of five equations describing the atmospheric dynamics and implemented a simple bulk parametrization that represents the role of cloud condensation nuclei (CCN) 's role in cloud formation processes. To explore the effect of different CCN concentrations and distributions, we used two CCN profiles, one with a single accumulation layer and one with two layers, modifying their concentrations. Our results showed that polluted scenarios resulted in rain inhibition when a single CCN layer was initially present and rain increment when two layers were present. In low-polluted environments, both CCN initial profiles generated similar precipitation and showed similar dynamic patterns. In this talk, we will highlight the importance of the vertical distribution of CCN, not only concentration, on the formation of rain, its inhibition, or suppression. This is joint work with Olmo Guerrero Medina.
  • Classification : 86A08, 35Q86
  • Format : Talk at Waseda University
  • Author(s) :
    • Gerardo Hernandez-Duenas (National Autonomous University of Mexico, Institute of Mathematicas)
    • Olmo Guerrero-Medina (University of California Davis)

[02554] Domain-invariant subcell-based blending limiter for Lax-Wendroff Flux Reconstruction

  • Session Time & Room : 3C (Aug.23, 13:20-15:00) @D408
  • Type : Contributed Talk
  • Abstract : Lax-Wendroff flux reconstruction (LWFR) is a single-step, arbitrarily high order, quadrature free method for solving hyperbolic conservation laws. We propose a subcell-based blending scheme for LWFR. By using MUSCL-Hancock reconstruction on the subcells and Gauss-Legendre points in flux reconstruction, we improve small-scale resolution compared to the subcell-based RKDG scheme of Henneman et al. $($2020$)$. We also propose a cost-effective correction to obtain a provably domain-invariant Lax-Wendroff scheme. Efficient Julia implementation will be discussed.
  • Classification : 76M10, 76M12, 76-04, 35L65
  • Format : Talk at Waseda University
  • Author(s) :
    • Arpit Babbar (Tata Institute of Fundamental Research - Centre for Applicable Mathematics (Bangalore))
    • Praveen Chandrashekar (Tata Institute of Fundamental Research - Centre for Applicable Mathematics (Bangalore))
    • Sudarshan Kumar Kenettinkara (School of Mathematics, Indian Institute of Science Education and Research)