Fluid or bulk matter in the Fluid Library can be of different types (flavors), called batches. Batches are transferred by pipelines in FIFO order, and, unless explicitly specified, do not mix in the tanks. All library blocks allow you to react to a new batch appearing at the input or reaching the output. The actions may include route changes, closing or opening valves, and so on.
Batches can be arbitrary objects, for example, text strings, numbers, compound objects, or even agents.
A batch optionally may have an associated color. In the Fluid Library, whenever a new batch is created, you can specify the color of the batch. That color will then show in the flowchart and in the animation. The library does not store the batch-to-color mapping, so if you, say, set yellow color for the batch "Diesel" in one object, and brown color for the batch also called "Diesel" in another object, these two batches will have different colors unless they merge, in which case one of the colors will be kept.
By default, if the user does not specify custom batches, all fluid in the Fluid Library flowchart is of batch type BatchTypes.DEFAULT_BATCH and is of navy color.
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