Week 1- Mixing Tee
Practice problem Geometry with Coarse Meshing (hot Inlet at 3 m/s with 25 degree C temperature and cold inlet at 10 m/s with 10 degree C temperature for short mixing tee :-
Practice problem Meshing with Coarse Meshing (hot Inlet at 3 m/s with 25 degree C temperature and cold inlet at 10 m/s with 10 degree C temperature for short mixing tee :-
Practice problem Calculations with Coarse Meshing (hot Inlet at 3 m/s with 25 degree C temperature and cold inlet at 10 m/s with 10 degree C temperature for short mixing tee :-
Practice problem Area Weighted Temperature with Coarse Meshing (hot Inlet at 3 m/s with 25 degree C temperature and cold inlet at 10 m/s with 10 degree C temperature for short mixing tee :-
Practice problem Standard Deviation of Temperature with Coarse Meshing (hot Inlet at 3 m/s with 25 degree C temperature and cold inlet at 10 m/s with 10 degree C temperature for short mixing tee :-
Practice problem Temperature contours on Cutplane z with Coarse Meshing (hot Inlet at 3 m/s with 25 degree C temperature and cold inlet at 10 m/s with 10 degree C temperature for short mixing tee :-
Practice problem Meshing with Refined Meshing (hot Inlet at 3 m/s with 25 degree C temperature and cold inlet at 10 m/s with 10 degree C temperature for short mixing tee :-
Practice problem Calculations with Refined Meshing (hot Inlet at 3 m/s with 25 degree C temperature and cold inlet at 10 m/s with 10 degree C temperature for short mixing tee :-
Practice problem Area Weighted Temperature with Refined Meshing (hot Inlet at 3 m/s with 25 degree C temperature and cold inlet at 10 m/s with 10 degree C temperature for short mixing tee :-
Practice problem Standard Deviation of Temperature with Refined Meshing (hot Inlet at 3 m/s with 25 degree C temperature and cold inlet at 10 m/s with 10 degree C temperature for short mixing tee :-
Practice problem Temperature contours on Cutplane z with Refined Meshing (hot Inlet at 3 m/s with 25 degree C temperature and cold inlet at 10 m/s with 10 degree C temperature for short mixing tee :-
Practice problem Temperature contours on Cutplane z with Refined Meshing (hot Inlet at 3 m/s with 25 degree C temperature and cold inlet at 10 m/s with 10 degree C temperature for short mixing tee with mesh lines removed :-
Case I (a): Short mixing Tee with hot inlet velocity of 3m/s & momentum ration as 2 (k-epsilon model) :-
Calculations:-
Area weighted temperature:-
Standard deviation of temperature:-
Temperature contours on cutplane z:-
Case I (a): Short mixing Tee with hot inlet velocity of 3m/s & momentum ration as 2 (k-omega SST model) :-
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Date
2021/10/14 23:27:23
Contents
1. File Report
Table 1 File Information for Mixing Tee_Challenge
2. Mesh Report
Table 2 Mesh Information for Mixing Tee_Challenge
3. Physics Report
Table 3 Domain Physics for Mixing Tee_Challenge
Table 4 Boundary Physics for Mixing Tee_Challenge
4. User Data
Chart 1
Chart 2
1. File Report
Table 1. File Information for Mixing Tee_Challenge
Case Mixing Tee_Challenge
File Path G:\PhD Work\Skill Lync Data\Mixing Tee Challenge\Mixing Tee_Challenge_files\dp0\FFF\Fluent\FFF-8-00300.dat.h5
File Date 14 October 2021
File Time 10:58:11 PM
File Type CFF
File Version --
2. Mesh Report
Table 2. Mesh Information for Mixing Tee_Challenge
Domain Nodes Elements
volume_volume 87138 450316
3. Physics Report
Table 3. Domain Physics for Mixing Tee_Challenge
Domain - volume_volume
Type FLUID
Location volume_volume
Table 4. Boundary Physics for Mixing Tee_Challenge
Domain Boundaries
volume_volume Boundary - inlet x
Type VELOCITY-INLET
Location inlet-x
Boundary - inlet y
Type VELOCITY-INLET
Location inlet-y
Boundary - outlet
Type PRESSURE-OUTLET
Location outlet
Boundary - wall
Type WALL
Location wall
Calculations:-
Area weighted temperature:-
Standard deviation of temperature:-
Temperature contours on cutplane z:-
K-epsilon model gives accurate and quick results as compared to k-omega SST model, hence k-epsilon model is used for further calculations and simulations.
Case I (b): Short mixing Tee with hot inlet velocity of 3m/s & momentum ration as 4 (k-epsilon model) :-
Calculations:-
Area weighted temperature:-
Standard deviation of temperature:-
Temperature contours on cutplane z:-
Velocity contours on cutplane z:-
Temperature contours on cutplane x:-
Velocity contours on cutplane x:-
Temperature line plots along length of pipe at x=0.05 m and x=0.1 m:-
Velocity line plots along length of pipe at x=0.05 m and x=0.1 m:-
Temperature line plots across length of pipe at z=0 m and z=0.008 m:-
Velocity line plots across length of pipe at z=0 m and z=0.008 m:-
Case II (a): Long mixing Tee with hot inlet velocity of 3m/s & momentum ration as 2 (k-epsilon model) :-
Geometry:-
Meshing:-
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Date
2021/10/15 01:52:38
Contents
1. File Report
Table 1 File Information for Long Mixing Tee_Challenge
2. Mesh Report
Table 2 Mesh Information for Long Mixing Tee_Challenge
3. Physics Report
Table 3 Domain Physics for Long Mixing Tee_Challenge
Table 4 Boundary Physics for Long Mixing Tee_Challenge
4. User Data
Chart 1
1. File Report
Table 1. File Information for Long Mixing Tee_Challenge
Case Long Mixing Tee_Challenge
File Path G:\PhD Work\Skill Lync Data\Mixing Tee Challenge\Mixing Tee_Challenge_files\dp0\FFF-1\Fluent\FFF-1-3-00300.dat.h5
File Date 15 October 2021
File Time 01:51:51 AM
File Type CFF
File Version --
2. Mesh Report
Table 2. Mesh Information for Long Mixing Tee_Challenge
Domain Nodes Elements
volume_volume 96622 497660
3. Physics Report
Table 3. Domain Physics for Long Mixing Tee_Challenge
Domain - volume_volume
Type FLUID
Location volume_volume
Table 4. Boundary Physics for Long Mixing Tee_Challenge
Domain Boundaries
volume_volume Boundary - inlet_x
Type VELOCITY-INLET
Location inlet_x
Boundary - inlet_y
Type VELOCITY-INLET
Location inlet_y
Boundary - outlet
Type PRESSURE-OUTLET
Location outlet
Boundary - wall
Type WALL
Location wall
Calculations:-
Area weighted temperature:-
Standard deviation of temperature:-
Temperature contours on cutplane z:-
Velocity contours on cutplane z:-
Temperature contours on cutplane x:-
Velocity contours on cutplane x:-
Temperature line plots along length of pipe at x=0.05 m and x=0.1 m:-
Velocity line plots along length of pipe at x=0.05 m and x=0.1 m:-
Case II (b): Long mixing Tee with hot inlet velocity of 3m/s & momentum ration as 4 (k-epsilon model) :-
Calculations:-
Area weighted temperature:-
Standard deviation of temperature:-
Temperature contours on cutplane z:-
Velocity contours on cutplane z:-
Temperature contours on cutplane x:-
Velocity contours on cutplane x:-
Temperature line plots along length of pipe at x=0.05 m and x=0.1 m:-
Velocity line plots along length of pipe at x=0.05 m and x=0.1 m:-
Temperature line plots across length of pipe at z=0 m and z=0.008 m:-
Velocity line plots across length of pipe at z=0 m and z=0.008 m:-
Mesh independent study is also done and depicted in above screenshots. The length of Tee is not playing any significant role in the outlet temperature conditions. However, the momentum ratio is severely affecting the outlet temperature. More the momentum ratio, more is the cooling effect and temperature is much lower for higher momentum ratios.
| Cell counts | Average Outlet Temperature | No of Iterations for Convergence | |
| Case I (a) | 450316 | 30.35 | 180 |
| Cse I (b) | 450316 | 27.5 | 300 |
| Case II (a) | 497660 | 30.40 | 140 |
| Case II (b) | 497660 | 27.55 | 300 |
Regards,
D Nautiyal