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📘 Gran-DEM Documentation
1. Introduction
The Gran-DEM particle flow simulator is a commercial particle flow DISCRETE ELEMENT METHOD (DEM) application that can be used to simulate particle flow in any type of pre-designed 3-D domain. This 3-D domain can be a mesh file (.msh) imported into the Gran-DEM application. The Gran-DEM application …
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📘 Gran-DEM Documentation
6.1 Description and theory
The injection of particles into the domain is set up in this functionality. Here a flexible injection system has been provided where user is able to choose from a variety of types of injection depending on requirement. There are 4 main types of injections that can be defined. They are; Injecti…
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📘 Gran-DEM Documentation
6.1.1 Injection type 1: Specific point injection:
This is a completely flexible injection option provided where individual independent injection points can be defined as needed by the user. Each injection point is specified with basic variables like particle diameter, number of particles per parcel, parcel diameter, X, Y, Z position point in 3D sp…
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📘 Gran-DEM Documentation
6.1.2 Injection type 2: Cell centre fixed point injection:
Injection points are created at the cell centre positions of all the Eulerian grid in the system. This setting requires basic variables specified as particle diameter, number of particles per parcel, parcel diameter, X, Y, Z position point in 3D space, mean injection velocity in 3D space, Temperatu…
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📘 Gran-DEM Documentation
6.2 Setting up:
6.1 Injection Initialization – Specific Point InjectionThe Specific Point Injection method is used to introduce particles into the computational domain from one or more user-defined locations. Each injection point represents a particle source where particles are generated with specified physical pr…
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📘 Gran-DEM Documentation
9.2 Setting up:
The output path and output time interval needs to be set using the check boxes at the top. The output path is the path where the output data will be written.Check boxes for time step size, DEM steps/Time step, Number of time step simulations and End time have been provided in the center…
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📘 Gran-DEM Documentation
6.1.3 Injection type 3: Fixed square grid ordered injection:
Injection points are created in a fixed square grid. This setting involves minimum and maximum positions in X,Y,Z direction and particle pitch that needs to be provided. Here the minimum and maximum can be seen as a cutoff limit in the Eulerian grid as shown in Fig. 6.1. Using this info a square gr…
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📘 Gran-DEM Documentation
6.1.4 Injection type 4: Feed channel injection:
This is a special injection type where a channel feed type of injection can be defined. The injection type requires to be set with a mass flow rate, particle injection velocity and position. Using this information concentric rings of injection points are created for particulate injection. Fig. 6.2 …
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