Repeat the same problems solved in session 10, using FLUENT.
 

Laminar flow (Gambit process file):

Start Fluent/2D

1. Read mesh file: File - Read - Case

2. Scale the grid: Grid - Scale ....
   Under unit conversion, select "in" for "Grid was Created In"
   Then Click "Scale"
   Click "Change Length units" to set inches as the working units for length
   Click "Close"
   
3. Define - Models - Solver 
   Solver = Segregated
   Time = Unsteady
   Unsteady Formulation = 2nd-order Implicit

4. Define - Model - Energy 
   Check "Energy Equation"

5. Define Materials to specifiy all parameters

6. Define Boundary Conditions
   Define - User-Defined - Interpret .... 
         Interpret the source code inlet_x_velocity.c
   Define - Boundary Conditions to define inflow1 and inflow2 

7. Solve - Initialize - Initialize
   Set velocity to zero, temp to 283.0K

8. Solve - Monitors - Residual - check Plot - Plot - OK

9. File - Write - Autosave 
   set frequency = 5 for both data and case files

   Solve - Animate - Define
   Every 1 time step, 
   Define In Memory, Window=1, Click "Set", 
      Contours/temperature, Display, Close
   OK - OK

10. Solve - Iterate
   Time step size = 0.1
   Number of Time steps = 100
   check Adaptive
   Maximum iterations per step = 800
   Truncation error = 0.001
   Ending time = 800.
   Maximum time step size = 10.
   Iterate

Notes: The solution was actually done in 99 time steps.

To animate: Solve - Animate - playback
Play an animation movie based on a FLUENT simulation- temperature evolution: Movie
 


Comparing steady-Steady solution with FIDAP - temperature profile at output:

Turbulent Flow: (Gambit process file)

Start Fluent/2D

1. Read mesh file: File - Read - Case

2. Scale the grid: Grid - Scale ....
   Under unit conversion, select "in" for "Grid was Created In"
   Then Click "Scale"
   Click "Change Length units" to set inches as the working units for length
   Click "Close"

3. Define - Solver (use default)

4. Define - Viscous (pick standard k-epsilon)

5. Define - Model - Energy
   Check "Energy Equation"

6. Define Materials to specifiy all parameters

7. Define Boundary Conditions
   inflow1: x-velocity = 10 m/s
            y-velocity = 0
            temperature = 283K
            Turbulence spcficication method = intensity and hydraulic diameter
            turbuelnce intensity = 5%
            hydraulic diameter = 32 in

   inflow2: x-velocity = 0 m/s
            y-velocity = 10 m/s
            temperature = 330K
            Turbulence spcficication method = intensity and hydraulic diameter
            turbuelnce intensity = 5%
            hydraulic diameter = 8 in
   outlet:  (only when flow enters the domain through this boundary, does note apply)
            total temp = 283
            Turbulence spcficication method = intensity and hydraulic diameter
            turbuelnce intensity = 5%
            hydraulic diameter = 32 in

8. Solve - Initialize - Initialize
   Use inflow1 to initialize

9. Solve - Monitors - Residual

10. Solve - Iterate

Temperature profile at output

K.E. profile at outlet

Dissipation rate profile at outlet