- **ANSYS**
(*https://www.cfd-online.com/Forums/ansys/*)

- - **Lagrangian particle tracking in mechanically agitated mono-dispersed and poly-dispers**
(*https://www.cfd-online.com/Forums/ansys/230331-lagrangian-particle-tracking-mechanically-agitated-mono-dispersed-poly-dispers.html*)

Lagrangian particle tracking in mechanically agitated mono-dispersed and poly-dispersHi
I am working on Lagrangian particle tracking in mechanically agitated mono-dispersed and poly-dispersed suspensions. 1) Mono-dispersed suspensionsDetails of my simulations are as follows:-Continuous fluid: Water (volume fraction: 0.896, density: 1150kg/L)-Dispersed Solid: Glass beads (volume fraction glass: 0.104; density: 2485kg/L; glass bead sizes: 1mmApproach:Step 1: I solve the flow field using the steady-state Eulerian approach. Step 2: To perform the transient Lagrangian approach, I use the simulation results if the steady-state Eulerian approach as initial conditions. I inject the 1000 lagrangian particles of size 400 micron and density of 1150 kg/L (same as water) to track flow field of a continuous fluid and the 1000 lagrangian particles of size 400 micron and density of 2485 kg/L (same as glass) to track flow field of dispersed phase. I have validated the results (for example velocity and solid distribution) of my simulations using experimental data (PEPT data), they are perfectly matched with experimental results. So my question here are Q 1: Is this right? Q 2: when I inject the lagrangian particle in step 2 (Lagrangian approach), what should be the particle size and how do these particles knows that what they are tracking (continuous or dispersed flow field)? Because in case of Poly-dispersed suspension (see simulation details below) it is very difficult to decide the lagrangian particle size (that can track the solid flow field of 5 different glass) Q3: Should the same of lagrangian particles same as dispersed phase size? 2) Poly-dispersed suspensionsDetails of my simulations are as follows:-Continuous fluid: Water (volume fraction: 0.896, density: 1150kg/L) -Poly-dispersed Solid: Glass beads (total volume fraction glass: 0.104; density: 2485kg/L; glass bead sizes: 1mm, 1.5mm, 2mm, 2.5mm, 3mm, equal valume fraction i.e 0.2 X total volume fraction glass) Approach: Step 1: I solve the flow field using the steady-state Eulerian approach. Step 2: To perform the transient Lagrangian approach, I use the simulation results if the steady-state Eulerian approach as initial conditions. I inject the 1000 Lagrangian particles of size 400 micron and density of 1150 kg/L (same as water) to track flow field of a continuous fluid. How should I track the solid phase of 5 different glass? If you know the answer or have any comment, suggestion are welcome. Thank you Regards AJ |

All times are GMT -4. The time now is 19:31. |