Week 1- Mixing Tee

CASE 1:

1. Mixing Tee_ Shorter length:

Input:

1. Short mixing tee with a hot inlet velocity of 3m/s.
2. Momentum ratio of 2, 4.
3. Short mixing tee with cold inlet velocity = 7.2 m/s (2.4=x/3)
4. Use the k-epsilon model
5. Hot inlet temperature is 36 C & the Cold inlet is at 19 C.

CASE 2:

1. Mixing Tee_ Longer length:

Input:

1. Short mixing tee with a hot inlet velocity of 3m/s.
2. Momentum ratio of 2, 4.
3. Short mixing tee with cold inlet velocity = 7.2 m/s (2.4=x/3)
4. Use k-omega SST model
5. Hot inlet temperature is 36 C & the Cold inlet is at 19 C.

Results:

#	Result compression	Case 1	Case 2
1	Cell count	106587	140990
2	Average outlet temperature	26-28 C	29 C
3	Number of iterations for convergence	200	200

Expected Results:

1. Velocity and temperature contour plots on the cut planes along and across the pipe.

Case 1: Mixing Tee_ Shorter length

Case 2: Mixing Tee_ Longer length

2. Velocity and temperature line plots along and across the length of the pipe

Case 1: Mixing Tee_ Shorter length

Case 2: Mixing Tee_ Longer length

3. Perform Mesh independent study for any one case

Study for Longer length Tee:

Temperature @ 2mm mesh: 26-28 C

Velocity @ 2mm mesh: 5.25 m/s

Temperature @ 5mm mesh: 29.5 C

Velocity @ 5 mm mesh: 5m/s

4. Discuss the effect of length and momentum ratio on results.

Longer length Tee has good mixing ratio. From above fig it shows temperature distribution and velocity distribution of hot and clod gasses mixed over the longer length tee.