CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS

Lagrangian particle tracking in mechanically agitated mono-dispersed and poly-dispers

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   September 18, 2020, 15:19
Default Lagrangian particle tracking in mechanically agitated mono-dispersed and poly-dispers
  #1
New Member
 
AJ
Join Date: Sep 2020
Posts: 1
Rep Power: 0
anandjjadhaviitr is on a distinguished road
Hi
I am working on Lagrangian particle tracking in mechanically agitated mono-dispersed and poly-dispersed suspensions.

1) Mono-dispersed suspensions
Details 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: 1mm

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 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 suspensions
Details 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
anandjjadhaviitr is offline   Reply With Quote

Reply

Tags
eulerian-eulerian model, lagrangian particles, multi phase

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 12:12.