[ t_blend = k_t \cdot \left(\fracTD\right)^2 \cdot \frac1N ]
Older spreadsheets rely on VBA (Visual Basic for Applications) for iterative solving (e.g., finding the exact impeller diameter for a target power number). When Microsoft updates Excel, these macros often break. A repack fixes these references. agitator design calculation xls repack
The repack’s dropdown shows 10 impellers. Select Pitched Blade Turbine (45°, 4 blades). [ t_blend = k_t \cdot \left(\fracTD\right)^2 \cdot \frac1N ]
This is where the design engineer inputs the fluid properties and tank geometry. Older spreadsheets rely on VBA (Visual Basic for
| Parameter | Symbol | Unit | Description | | :--- | :--- | :--- | :--- | | Fluid Density | $\rho$ | kg/m³ | Mass per unit volume of the liquid. | | Viscosity | $\mu$ | cP or Pa.s | Resistance to flow (critical for Reynolds number). | | Tank Diameter | $T$ | m | Inner diameter of the vessel. | | Liquid Level | $H$ | m | Height of the liquid content. | | Impeller Diameter | $D$ | m | Diameter of the agitator blade (usually $D = T/3$ to $T/2$). | | Rotational Speed | $N$ | rpm | Revolutions per minute. | | Number of Impellers | $n$ | - | Single or multiple stages. |