Quick Answer
Calculate FDM Nozzle Volumetric Flow Rate from Layer Height and Melt Viscosity
Calculator
Result Interpretation
FDM Nozzle Volumetric Flow Rate from Layer Height and Melt Viscosity Calculator computes Volumetric nozzle flow rate in m³/s using the defined engineering formula and the input values provided.
Worked Example
Verified calculation
Given:
- Extrusion pressure drop = 180000
- Print layer height = 0.00015
- Effective extrusion width (assumed equal to layer width) = 0.00035
- Nozzle internal flow path length = 0.0028
- Polymer melt dynamic viscosity at nozzle temperature = 45
Expected Result:
- Volumetric nozzle flow rate = 1.40625E-10
Engineering Interpretation:
Under the given input conditions, the calculated result is: Volumetric nozzle flow rate = 1.40625E-10 m³/s.
The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from automatically validated test cases.
Formula / Method
volumetric nozzle flow rate = (extrusion pressure drop * pow(print layer height, 3) * assumed equal to layer width) / (12.0 * polymer melt dynamic viscosity at nozzle temperature * nozzle internal flow path length)Formula family: formula_additive_fdm_nozzle_flow_rate_vs_layer_height_material_melt_viscosity_sizing_tool
Variables
| Symbol | Label | Role | Description |
|---|---|---|---|
| delta_p | Extrusion pressure drop | INPUT | Extrusion pressure drop |
| layer_height | Print layer height | INPUT | Print layer height |
| nozzle_width | Effective extrusion width (assumed equal to layer width) | INPUT | Effective extrusion width (assumed equal to layer width) |
| melt_viscosity | Polymer melt dynamic viscosity at nozzle temperature | INPUT | Polymer melt dynamic viscosity at nozzle temperature |
| nozzle_length | Nozzle internal flow path length | INPUT | Nozzle internal flow path length |
| nozzle_flow_rate | Volumetric nozzle flow rate | OUTPUT | Volumetric nozzle flow rate |
Calculation Steps
- Enter the extrusion pressure drop in Pa.
- Enter the print layer height in m.
- Enter the effective extrusion width (assumed equal to layer width) in m.
- Enter the polymer melt dynamic viscosity at nozzle temperature in Pa·s.
- Enter the nozzle internal flow path length in m.
- Step 1: Compute volumetric nozzle flow rate.
- Read the volumetric nozzle flow rate (m³/s) from the results.
Engineering Summary
Calculate FDM Nozzle Volumetric Flow Rate from Layer Height and Melt Viscosity
Frequently Asked Questions
What does this calculator calculate?
The FDM Nozzle Volumetric Flow Rate from Layer Height and Melt Viscosity Calculator estimates Volumetric nozzle flow rate based on the input parameters you provide
Why is extrusion pressure drop important in this calculation?
extrusion pressure drop is directly proportional to volumetric nozzle flow rate. When you enter extrusion pressure drop in Pa, the calculator uses it in the engineering formula to compute the output
How should I interpret the result volumetric nozzle flow rate?
The calculator outputs volumetric nozzle flow rate in m³/s. The result is computed directly from the input values using the defined engineering formula
What units should I use for the inputs?
Enter each value in the units shown next to the input field: Extrusion pressure drop (Pa), Print layer height (m), Effective extrusion width (assumed equal to layer width) (m), Polymer melt dynamic viscosity at nozzle temperature (Pa·s), Nozzle internal flow path length (m). Make sure all inputs use the specified units for consistent results
What assumptions does this calculator use?
This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment
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