Simulation inclined blade stirrer

The simulation of  mixing and stirring in inclined blade stirrers can perfectly be performed using the NOGRID points CFD software. This type of stirrer operates at high rotational speeds and is classified as a tangentially and axially conveying mixer, primarily used for low-viscosity media. The container shapes used with these stirrers often vary in their slenderness ratios and bottom shapes.

In this case, the inclined blade stirrer has a round bottom (dished bottom), making it suitable for pressure-resistant stirring processes. Furthermore, fluid-dynamic dead zones are avoided by the continuous transition to the cylindrical container wall. Containers with low aspect ratios, like the one in this case study, are typically designed for small volumes.

The inclined blade stirrer exhibits a strong conveying effect and still generates a vortex. The resulting characteristic flow pattern is determined by the stirring speed as well as the geometry of the container and the stirrer blades.

Mixing is an important part in chemical 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 homogenization of mixtures.

Improve product performance and reduce costs

Mixing simulation helps to understand the flow behavior within an agitator, enabling quick recommendations for design and operational improvements. This leads to enhanced product performance and a reduction in both production and maintenance costs. 

Compute any conceivable agitator geometry with mixing simulation

NOGRID provides a broad selection of rheology models, including those commonly used in chemical industry. With its unique capability to handle moving parts within the fluid domain, NOGRID enables the simulation of any 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 from very short computation time

One of the key advantages of NOGRID's meshless CFD software is its fast preprocessing - no need for mesh generation - combined with the outstanding short computation times, even for complex moving parts typically found in agitators. 

Advantages of NOGRID points software

NOGRID points combines the capabilities to handle free surface flow and moving parts within the domain. This leads to the following advantages:

• computation is in full 3D solving complete Navier-Stokes-Equations
• easy and intuitive setup for mixing cases
• free definable material properties by equations or curves
• evaluation of the mixing quality
• open or closed domains including inflow and outflow areas (non-batch mode)
• moving of the mixers in any direction