Flow Rate Transition
Summary
Flow Rate Transition represents an intentional change in throughput between two steady-state sections of a flowsheet. It preserves feed PSD, component composition and material properties while imposing independent solids and water rates on the product stream.
DPSIM model key: DPSIM.Feed.FlowRateTransition
Category: Feed
Subcategory: Feeders
Display name: Flow Rate Transition
Streams
| Port | Role |
|---|---|
| Feed | Provides PSD, component composition and material properties. |
| Product | Carries the feed quality at the configured solids and water rates. |
Parameters
| Parameter | Range | Description |
|---|---|---|
| Product dry solids flow (t/h) | ≥ 0 | Dry-solids flow imposed on the product stream. |
| Product water flow (m3/h) | ≥ 0 | Water flow imposed on the product stream. |
Model Calculation
For configured product rates SP* and WP*, the model sets:
SP = SP*
WP = WP*
For every size class i and component c, the retained fraction and component fraction are copied from feed:
rP,i = rF,i
xP,c,i = xF,c,i
The calculated parameters report the feed rates and the changes ΔS = SP - SF and ΔW = WP - WF.
Application and Limitations
Use the model when adjacent plant sections are represented at different steady-state production rates, for example when crushing and downstream treatment sections use different campaign, availability or operating-period assumptions.
The rate discontinuity is intentional. DPSIM does not impose local reconciliation continuity across this equipment, but the global closure audit keeps the difference visible. The model does not represent physical storage, accumulation, feeder dynamics or water-addition equipment.
References
King, R. P. (2001). Modeling and Simulation of Mineral Processing Systems. Butterworth-Heinemann. General reference for stream representation and mineral-processing flowsheet simulation. Flow Rate Transition is a DPSIM scenario-boundary utility rather than an empirical model from this reference.