SRS Tutorial

1. Create Your Account

   Click "Get Started" on the landing page and fill in your details. You'll receive 2 hours of free compute time which you can buy just with 1€ + VAT!

2. Verify Your Email

   Check your inbox for a welcome email.

3. Sign In

   Use your email and password to access your dashboard.

4. Explore Your Dashboard

   Familiarize yourself with the interface — your compute time, storage, and quick actions are all accessible here.

1. Navigate to Start Simulation

   From your dashboard, click the "Start Simulation" button or use the sidebar menu.

2. Describe Your Simulation

   Give your simulation a name and brief descriptive so you can easily identify it later.

3. Prepare your ZIP folder

   Our platform takes a zip folder containing the simulation configuration file which must be exactly named "pyfr.ini", plus any mesh files your case requires (e.g. a Gmsh .msh mesh).

4. Validate your pyfr.ini file

   Inorder reduce the risk of errors, you must validate your pyfr.ini file before uploading your ZIP folder. Click the "Validate pyfr.ini file" button to validate your pyfr.ini file. For free users, the validation only checks the basic syntax. For paid users, the validation process is more comprehensive and includes the syntax check, system check, mesh check, and AI analysis for simulation parmeter stability. See section on AI features for more details.

5. Upload Your ZIP folder

   Click "Choose File" to select your ZIP folder. The folder will be uploaded to your cloud storage.

6. Review and Submit

   Double-check your settings and click "Start Simulation". Your simulation will be queued and start running on our NVIDIA A100 GPUs.

Understanding Job Status

Key Metrics to Watch

• Estimated Time Remaining (ETA)

  Predicted completion time based on current progress

• Duration

  Total time which includes all the stages from enqueue to completion and processing time which excludes the enqueue time. Hours consumped as calculed from processing time only.

• File Size

  Size of the resulting files in ZIP format

• Action Buttons

  View, download, cancel, or delete the job. Logs are available for viewing.

• Total Consumption

  Total and reaming consumed hours are shown via the progress bar.

1. Go to Jobs Portal

   Navigate to the Jobs section from your dashboard.

2. Find Your Completed Job

   Look for jobs with the "COMPLETED" status badge.

3. View Job Details

   Click on the job to expand details and see output files.

4. Download Results

   Click the "Download" button to save result files to your computer. You can also view logs directly in the browser.

Visualizing SRS Results in VisIt

Viewing SRS simulation results in VisIt involves opening the VTK/PVTU files exported by PyFR, then using VisIt's plotting and analysis tools. Below is a concise guide to get you started.

What you need to do

• Install a compatible VisIt version for your operating system (VisIt supports multiple platforms and data formats).

• Confirm that your SRS output is exported in a VisIt-readable format. PyFR's VTK/PVTU export is the most reliable option; XDMF is also supported. If unsure, check the PyFR documentation for export options.

• Prepare your data path or database: point VisIt to the directory containing the VTK/PVTU files. VisIt can also aggregate multiple time steps if you open the group as a database.

Core steps in VisIt

1. Start VisIt and open a database

   Go to File → Open File (or Open Database) and select your PyFR-exported VTK/PVTU file or directory.

2. Create a plot

   Choose an appropriate plot type (e.g., Pseudocolor for scalar fields like pressure or vorticity magnitude, Vector for velocities).

3. Apply data operations

   Use Expressions to compute derived quantities (e.g., Q-criterion, λ2, or custom scalars for turbulence visualization).

4. Time and animation

   If your results contain time steps, use the Animation controls to explore temporal evolution of turbulent structures.

5. Save visuals

   Export images or animations via File → Save Window or Save Animation.

Visualizing SRS Results in ParaView

ParaView is another widely used post-processor for PyFR-exported VTK/PVTU outputs. The workflow is similar to VisIt but uses its own UI and readers.

Steps to open SRS results in ParaView

1. Install a compatible ParaView version

   Download a version appropriate for your OS. Ensure that the release includes the VTK readers you need for HPC data formats.

2. Confirm the SRS output format

   PyFR's VTK/PVTU export is the most ParaView-friendly option. Set format = vtk in the [output] section of your pyfr.ini if you only need ParaView compatibility.

3. Load the data in ParaView

   Go to File → Open, then select the PyFR-exported VTK/PVTU file or directory. ParaView will load the dataset and display available fields. For multi-step outputs, open the group as a time-varying dataset rather than individual time-step files.

4. Visualizing fields

   Use the Properties panel to choose a representation (e.g., Volume, Surface, Glyphs). Adjust color maps and opacity to highlight important variables (pressure, velocity magnitude, vorticity).

5. Time steps and animation

   If the dataset includes multiple time steps, use ParaView's animation controls to play or scrub through time. ParaView automatically exposes time information for temporal datasets.

6. Derived quantities

   Use the Calculator or Expressions to compute derived fields (Q-criterion, λ2, vorticity, etc.), then visualize them alongside primary fields.

7. Saving and exporting results

   Use File → Save Screenshot or Save Animation to export images or movies. You can also save a ParaView state file to reproduce your visualization setup.