Sold by: Streamline Numerics
Deployed on AWS
AWS Free Tier
The Loci-Stream CFD code is a scalable parallel tool for fluid-flow and heat transfer simulations in large scale industrial applications. Many of the common features found in other standard CFD tools such as ANSYS-Fluent and Star-CCM+ are available. If you are interested in testing Loci-Stream, see the tutorials page on our website which contains run control and grid files for a number of cases that can be run directly.
Overview
The Loci-Stream CFD code is a scalable parallel tool for fluid-flow and heat transfer simulations in large scale industrial applications. The code supports fully-unstructured grids containing generalized cells with an arbitrary number of faces, including tetrahedral, pyramidal, prismatic and hexahedral cells. Grid translators are provided to create compatible grid files using grids generated from a variety of public domain and commercial grid generation packages. Volumetric and boundary output data may be extracted for visualization with a variety of post-processing packages, including FieldView, Tecplot and Paraview. Many of the common features found in other standard CFD tools such as ANSYS-Fluent and Star-CCM+ are available. End-users can develop modules to customize existing features or add new features to the code.
- Generalized unstructured grids.
- Pressure-based formulation for incompressible and compressible flows.
- SIMPLE and SIMPLEC algorithms for all flow problems. PIMPLE algorithm currently available for non-combusting flows.
- Advanced momentum interpolation techniques for conservative treatment of momentum equation source terms.
- State-of-the art convection schemes based on the SLAU formulation for compressible flows.
- Supports grids with multiple components in relative motion with interpolated interface boundary conditions or overset grids with i-blank hole cutting.
- Comprehensive set of boundary conditions available, including file-based and functional time-dependent boundary conditions.
- First-order (BDF) and second-order (BDF2 and blended BDF/CN) timestepping schemes with variable timestep formulation.
- Comprehensive set of turbulence models available, including RANS-based k-e and k-w models, Detached Eddy Simulation (DES) models and an algebraic Large Eddy Simulation (LES) model. Momentum and thermal boundary layer wall functions for RANS simulations.
- Finite-rate chemistry simulation for combusting flows using second-order Strang operator splitting.
- Compressible flamelet method for efficient simulation of combusting flows with large combustion kinetics mechanisms. Flamelets with inert components for simulation of hypergolic reactants.
- Fully-compressible cavitation simulation with a variety of cavitation models.
- Algebraic Multi-VOF method for simulations with an arbitrary number of immiscible fluid components.
Highlights
- High-Performance CFD Solver
- Generalized unstructured grids
- Pressure-based formulation for both incompressible and compressible flows
Details
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Delivery method
Delivery option
64-bit (x86) Amazon Machine Image (AMI)
Latest version
Operating system
Ubuntu 24.04.1 LTS
Deployed on AWS
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Pricing
Pricing is based on actual usage, with charges varying according to how much you consume. Subscriptions have no end date and may be canceled any time.
Additional AWS infrastructure costs may apply. Use the AWS Pricing Calculator to estimate your infrastructure costs.
If you are an AWS Free Tier customer with a free plan, you are eligible to subscribe to this offer. You can use free credits to cover the cost of eligible AWS infrastructure. See AWS Free Tier for more details. If you created an AWS account before July 15th, 2025, and qualify for the Legacy AWS Free Tier, Amazon EC2 charges for Micro instances are free for up to 750 hours per month. See Legacy AWS Free Tier for more details.
Dimension | Cost/hour |
|---|---|
t3.2xlarge Recommended | $0.24 |
t3.micro | $0.06 |
c4.4xlarge | $0.48 |
c4.8xlarge | $0.96 |
c6i.32xlarge | $3.84 |
c7i.16xlarge | $1.92 |
c6i.24xlarge | $2.88 |
Dimensions summary
You pay by the hour for running this CFD solver, and the rate depends on the AWS instance type you choose. Each dimension maps to a specific EC2 machine size. Smaller instances like t3.micro and t3.2xlarge suit lighter workloads or testing tutorial cases. Larger compute-focused instances such as c4.4xlarge, c4.8xlarge, c6i.24xlarge, c6i.32xlarge, and c7i.16xlarge fit bigger simulations that need more processing power. You add hours only when an instance runs. Charges stop when you shut the instance down. This suits short-term or on-demand simulation needs without dedicated hardware.
Top-of-mind questions for buyers
You pay two hourly charges when an instance runs. One is a software fee for running the solver. The other is a hardware fee tied to the EC2 instance type you pick. Both accrue per hour while the instance is active.
Software charges meter running time only. When you shut the instance down, the hourly software and hardware fees stop. Note that stored volumes may still incur AWS storage costs while data remains, even when the instance is not running.
Match the instance to your workload size. Smaller instances like t3.micro suit assessing capabilities or running tutorial cases for a small fee. Larger compute-focused instances handle bigger simulations needing more processors. You allocate hardware sized to your needs, run, then download results to your local machine.
www.snumerics.com
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Vendor refund policy
The Loci-Stream charges are on-demand only, so no refunds are available.
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Delivery details
64-bit (x86) Amazon Machine Image (AMI)
Amazon Machine Image (AMI)
An AMI is a virtual image that provides the information required to launch an instance. Amazon EC2 (Elastic Compute Cloud) instances are virtual servers on which you can run your applications and workloads, offering varying combinations of CPU, memory, storage, and networking resources. You can launch as many instances from as many different AMIs as you need.
Version release notes
Release for Loci-Stream 2.2.3 version of the software. This version contains the flamelet table tool for users to use in conjunction with the flamelet module in Loci-Stream.
Additional details
Usage instructions
We have created a detailed step-by-step guide for launching and using Loci-Stream on an AWS instance. Use the following link to open and view the guide: https://www.snumerics.com/s/locistream_aws_guide.pdf .
For more information on learning how to use Loci-Stream, see our Users' guide which is available at: https://www.snumerics.com/s/stream_guide.pdf .
A collection of ready-to-run tutorials for various case types to help you get started are available on our website: https://www.snumerics.com/tutorials .
Resources
Vendor resources
Support
Vendor support
For product support, please see the "User Resources" section on our website or contact us at https://www.snumerics.com/contact .
AWS infrastructure support
AWS Support is a one-on-one, fast-response support channel that is staffed 24x7x365 with experienced and technical support engineers. The service helps customers of all sizes and technical abilities to successfully utilize the products and features provided by Amazon Web Services.
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