Engineering Report MECH3870/6480 S2/2022
2D & 3D PIPE FLOWS WITH COOLING EFFECT
D(m)
wonrocoes: {RRR 55”
temperature 1 outlet
inlet Wilh
Ty=15°C
L(m)
REQUEST: files to be submitted on Canvas:
1. PowerPoint Report based on provide template (please do not change anything in the template, just add
your image/animation or important analysis onto the slides)
2. Mesh file .msh
3. Case file .cas
NOTES
4. Please don’t work for your friend under any circumstances.
5. You can be asked to submit the workbench zip file wbpz file (File>Archive) any time during marking.
6. If you fail to prove you do the work yourself, your case will be transfe
ed to Student Conduct team.
INSTRUCTIONS:
A. Part A: 2D simulation, laminar, steady state, limit to 10° cells (50 points)
1. Geometry: relate your student number and geometry assigned.
2. Mesh: using Face Meshing method, Sizing & Bias
3. Fluent:
e Gravity on| Energy on| Laminar| Residuals: minimum 10 | Materials: liquid water | Velocity inlet &
pressure outlet | Wall Convection & Aluminium thickness 0.2mm |
© Water properties: Cp=4180 J/kgK | rho=980kg/cm? | k=0.66 W/mK | mu = -5.41E-6 * T + 2.27E-3 kg/m.s
e Solution/method (defaults as in Fluent)
* Compute Mass flowrate inlet/outlet & Plot Wall Yplus
4. CFD Post:
e Temperature & Pressure contours
* Velocity vectors with horizontal Color ba
* Plot velocity profile at inlet, centre, and outlet
B. Part B: 3D simulation, tu
ulent, transient, limit to 10° cells (20 points)
1. Geometry: same diameter and length with part A
2. Mesh: using Sizing and Inflation (inlet or outlet)
3. Fluent:
* Similar to Part A except the Rans k-o 2 eq. for tu
ulence model
* Time step and number of time steps: depends on your problem (ref: 0.01s in within 2 seconds)
* Initial conditions: compute from inlet, except initial temperature which is 300K instead.
4. CFD Post:
* Temperature & Pressure & Velocity contours at two centre planes along and across the pipe.
* Pressure & velocity contours at the centre plane along the pipe
* Amination: Temperature change at the centre plane along the pipe
C. Part C: Results analysis and validations (30 points)
Analytical model for 1D pipe flow (10p) (Op)
Pressure drop estimation and compare with your simulation results (10p)
Mesh independence analysis (for part A only) {5p} (10p) (> compare pressure contour between rough and fine mesh)
Wall Yplus estimation (note that Wall Yplus can be greater than 30) (Sp) (10p)
Br ND
PHAR Ao WIR J ¥ 4 863%
Assignment details
MECH3780/6480 FLUID MECHANICS 2 AND CFD (...
Data
Student Tinitial,
Vv, \'A Tinlets eee
number L ! h initial
. | d[m] laminar tu
ulent 2, /temperature
ending [m] [W/mK] temperature
. [m/s] | [m/s] inlet [K]
with IK]
XXXXXXXXXX{ 0.032 | XXXXXXXXXX
XXXXXXXXXX | XXXXXXXXXX
352 300
353 300
352 300
351 300
XXXXXXXXXX
XXXXXXXXXX
XXXXXXXXXX | XXXXXXXXXX
0.0078
£5 Doors? 0.032 | XXXXXXXXXX
_ yl
é
Problem & instruction
MECH3780_Engineering Report_Notice-
Submit assignment
PowerPoint Presentation
MECH3780/6480
ENGINEERING REPORT
1
Student full name:
Student number:
Boundary conditions
Velocity inlet: vi =
Temperature inlet: T =
Pressure outlet: pout =
Outside air temperature: 15oC
Convective heat transfer coefficient: h =
Reynolds number:
2
PART A & B
Note: for Part B please use the results at t=1s at the centre plane along the pipe in the following slides to see their contrast with 2D laminar results
2D laminar or 3D tu
ulent pipe flow with cooling effect
3
SNAPSHOT OF GEOMETRY
2D
Lamina
3D
Tu
ulent
Comments:
4
SNAPSHOT OF MESH
Comments:
2D
Lamina
3D
Tu
ulent
3D: Total # of elements: XXXXXXXXXXMethod: Edge sizing > Face sizing > Inflation
5
SNAPSHOT OF RESIDUALS
Comments:
2D
Lamina
3D
Tu
ulent
6
SNAPSHOT OF MASS FLOWRATE INLET/OUTLET AND WALL YPLUS
(*no Wall Yplus for laminar flow)
Comments:
2D
Lamina
3D
Tu
ulent
7
CONTOURS OF STATIC PRESSURE
Comments:
2D
Lamina
3D
Tu
ulent
8
Velocity profile at inlet, middle and outlet of the pipe
Comments:
2D
Lamina
3D
Tu
ulent
9
CONTOURS OF VELOCITY
Comments:
2D
Lamina
3D
Tu
ulent
10
CONTOURS OF TEMPERATURE
Comments:
2D
Lamina
3D
Tu
ulent
11
PART C
Results analysis and validation
12
ANALYSIS FOR BOTH 2D AND 3D SIMULATION
Wall Yplus estimation
2D Mesh independent analysis (rough > acceptable > fine)
13
ANALYSIS FOR BOTH 2D AND 3D SIMULATION
Suggest an analytical model for 1D pipe flow with heat transfer (Note: ODE model can be required; exact results is not compulsory but recommended) (no score, bonus only)
Pressure drop estimation and compare with your simulation results (10p)
14
ADDITIONAL COMMENTS (1)
15
ADDITIONAL COMMENTS (2)
PowerPoint Presentation
MECH3780/6480
ENGINEERING REPORT
1
Student full name:
Student number:
Boundary conditions
Velocity inlet: vi =
Temperature inlet: T =
Pressure outlet: pout =
Outside air temperature: 15oC
Convective heat transfer coefficient: h =
Reynolds number:
2
PART A & B
Note: for Part B please use the results at t=1s at the centre plane along the pipe in the following slides to see their contrast with 2D laminar results
2D laminar or 3D tu
ulent pipe flow with cooling effect
3
SNAPSHOT OF GEOMETRY
2D
Lamina
3D
Tu
ulent
Comments:
4
SNAPSHOT OF MESH
Comments:
2D
Lamina
3D
Tu
ulent
3D: Total # of elements: XXXXXXXXXXMethod: Edge sizing > Face sizing > Inflation
5
SNAPSHOT OF RESIDUALS
Comments:
2D
Lamina
3D
Tu
ulent
6
SNAPSHOT OF MASS FLOWRATE INLET/OUTLET AND WALL YPLUS
(*no Wall Yplus for laminar flow)
Comments:
2D
Lamina
3D
Tu
ulent
7
CONTOURS OF STATIC PRESSURE
Comments:
2D
Lamina
3D
Tu
ulent
8
Velocity profile at inlet, middle and outlet of the pipe
Comments:
2D
Lamina
3D
Tu
ulent
9
CONTOURS OF VELOCITY
Comments:
2D
Lamina
3D
Tu
ulent
10
CONTOURS OF TEMPERATURE
Comments:
2D
Lamina
3D
Tu
ulent
11
PART C
Results analysis and validation
12
ANALYSIS FOR BOTH 2D AND 3D SIMULATION
Wall Yplus estimation
2D Mesh independent analysis (rough > acceptable > fine)
13
ANALYSIS FOR BOTH 2D AND 3D SIMULATION
Suggest an analytical model for 1D pipe flow with heat transfer (Note: ODE model can be required; exact results is not compulsory but recommended) (no score, bonus only)
Pressure drop estimation and compare with your simulation results (10p)
14
ADDITIONAL COMMENTS (1)
15
ADDITIONAL COMMENTS (2)