Simulation Software for Fluids and SolidsSimulation disc stirrer with round bottom
The simulation of mixing in a disc stirrer with round bottom can be accurately performed using NOGRID points CFD software. Optimize your mixing process with this powerful tool, which is widely used in the chemical, pharmaceutical, food, and health care industries - especially where achieving homogeneous mixing in round-bottom vessels is crucial.
Use of disc stirrers
The inclined blade or disc stirrer featured in this case study is a tangentially conveying stirrer type, typically used for low-viscosity media. The container designs often vary in terms of slenderness and bottom shape. This particular stirrer has a round (drum-shaped) bottom, making it suitable for pressure-resistant stirring processes. In addition, fluid-dynamic dead zones are avoided due to the smooth, continuous transition between the bottom and the cylindrical container wall of the container.
Containers with low slenderness ratios, as in this case, are generally designed for small-volume applications. The disc stirrer does not generate a strong axial conveying effect, as the contents of the container are primarily moved tangentially. However, a vortex (trombe) still forms as a result of the mixing action.
Mixing plays a crucial role in the healthcare industry and is involved in processes such as the dispersion of two or more liquid, powdery, or gaseous components, deagglomeration to prevent lump formation, and the homogenization of mixtures.
Improve product performance and reduce costs
Mixing simulation can provide valuable insights into the flow behavior within an agitator, enabling quick identification of potential improvements in design and operating parameters. This helps enhance product performance while reducing both production and maintenance costs.
Compute any conceivable agitator geometry with mixing simulation
NOGRID provides a broad range of rheology models, including those commonly used in the chemical industry. Its unique capability to handle moving parts within the fluid domain enables the simulation of any conceivable agitator geometry and operating mode, such as
- rotating and counterwise rotating agitator blades, possibly moving up and down periodically at the same time
- overlapping operation ranges of moving parts as found in twin-screw agitators
- free surfaces at inlets or for different fluid levels or for fast rotating agitators with high centrifugal forces
Benefit of very short computation time
The particular strengths of NOGRID's meshless CFD software are the rapid preprocessing (no grid generation is required) and the outstanding short computation times, even for complex moving parts like those typically found in agitators.
Capabilities of NOGRID software
NOGRID combines the ability to handle free surface flows and moving parts within the domain. This leads to the following advantages:
- fully 3D computation solving the complete Navier-Stokes equations
- easy and intuitive setup for mixing cases
- freely definable material properties by equations or curves,
- evaluation of mixing quality
- open or closed domains, including inflow and outflow areas (non-batch mode)
- moving of mixers in any direction
Why choose Nogrid?
NOGRID provides professional CFD software for the simulation of fluid flow, heat and mass transfer, and chemical reactions. Its efficient modelling workflow helps engineers analyse flow behaviour, evaluate designs and make informed decisions without creating a conventional volume mesh.
Faster model preparation
With NOGRID, only the geometry boundary needs to be meshed. The finite points inside the fluid domain are generated automatically according to user-defined settings, both at the start of the simulation and during the calculation.
This approach reduces preprocessing effort and makes it easier to prepare complex geometries and cavities for simulation.
Efficient CFD workflow
The modelling process follows four straightforward steps:
Build the geometry. Mesh the boundary. Define the simulation. Start the calculation.
NOGRID is designed to provide short computation times, including for applications involving complex cavities. Engineers can use the resulting data to examine flow distribution and other relevant flow characteristics.
Better insight into fluid-flow processes
CFD solves the fundamental equations governing fluid flow. NOGRID software enables engineers to predict and analyse the behaviour of fluids and related physical processes before or alongside physical testing.
The simulation results can support:
- evaluation and comparison of design alternatives
- optimisation of construction and operating parameters
- improved planning reliability
- reduction of development time and testing effort
- faster progression from design to market or operation
Steps from geometry generation to simulation results
TRAINING
Our two-day training courses teach participants how to set up, run and evaluate simulations efficiently with NOGRID CFD software. The courses include practical guidance for handling different types of simulation cases.
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Technical Support
Professional support is available from the beginning of your work with NOGRID. Our technical team assists users by telephone and email with software operation, case setup and simulation-related questions.
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Simulation Service
When internal time, expertise or resources are limited, NOGRID can support your project with individual numerical simulation services. Our engineers develop and evaluate CFD models based on the specific requirements of your application.
For more details please refer to Software Support →