CORHEL-CME updates

February 2024

As of February 09, 2024, the CORHEL-CME version 1.0 is available to the community through the CCMC Runs-On-Request (ROR) service. User can submit a run via this ROR submission interface for the model.

What is CORHEL-CME?

CORHEL-CME, developed by Predictive Science Inc., is a novel MHD modeling framework specifically designed for non-experts. It consists of a collection of tools and simulation codes that are seamlessly integrated and accessible through an intuitive web interface. The web interface empowers you to simulate multiple coronal mass ejections (CMEs) in a realistic coronal and solar wind environment.

A Guided Approach to full physics-based CME Simulations

The CORHEL-CME web interface streamlines the process of conducting full physics-based CME simulations by guiding users through three steps:

1. Flux ropes and their eruptive behavior

Begin by creating one or more flux ropes using simplified (zero-beta) MHD simulations and evaluating their eruptive or non-eruptive behavior. A key innovation of CORHEL-CME is the incorporation of the Regularized Biot Savart Laws (RBSL; Titov et al., 2018) model. The RBSL model allows you to create pre-eruptive flux rope configurations above elongated and curved polarity inversion lines. This feature enables realistic simulations of CME eruptions from complex active regions.

2. Thermodynamic MHD solution of the corona and solar wind

You can choose from different heating models to simulate the thermodynamic state of the corona and solar wind background, in which the eruptions from step 1 will be embedded. As part of the CORHEL-CME framework, the MAS model incorporates a realistic energy equation that takes into account anisotropic thermal conduction, radiative losses, and coronal heating. This allows MAS to compute plasma density and temperature, enabling the simulation of EUV and X-ray emissions as observed from space.

3. Full physics-based CME simulations

In the final step of the web interface, you can request high-fidelity, time-dependent MHD simulation runs. These simulations involve launching individually designed flux ropes (step 1) into the corona and solar wind background (step 2) and evolve them to 1 AU.

Exploration and Visualization

At each step of the CME design and simulation, the CORHEL-CME user interface provides guidance through a "Take a Tour" button. It assists you with design choices by generating diagnostic plots and generates web-based visualization reports upon completion of each step.

Accelerated Research with High-Performance Computing

To ensure quick turnaround in your research-focused CME simulations, all CORHEL-CME runs are performed on high-performance GPU servers on Amazon Web Services (AWS).