CORMIX-CorJet Benchmark Cases

Welcome to the CORMIX benchmarking site. This site contains a collection of data from turbulent buoyant jet mixing experiments which constitute a database for "benchmarking" model performance- comparing simulation model predictions with observations. Statistical and graphical tools are presented for interactively comparing data with CORMIX simulation model results. The benchmark database is currently restricted to single port discharges. However, it could be extended to multiport diffusers, surface discharges, etc. The benchmarks presented here are for CorJet, the buoyant jet integral model used for near-field mixing prediction within CORMIX.

As defined in "Integral Model of Turbulent Buoyant Jets in Unbounded Stratified Flows. Part I: Single Round Jet" by G.H. Jirka, Environmental Fluid Mechanics Vol. 4, pp. 1-56, 2004, a benchmarking analysis includes 3 stages for buoyant jet integral model validation:

  1. Asymptotic Buoyant Jets Cases
  2. Non-equilibrium Flows; Entrainment Relationships and Drag Force in Flow Transitions and Jet Deflections.
  3. Spatial Limits to Integral Model Application
The benchmarks include five asymptotic self-similar states of buoyant jet flows:
  1. Pure jet
  2. Pure plume
  3. Pure wake
  4. Advected Line Puff
  5. Advected Line Thermal

This site presents information about turbulent buoyant jet mixing and CORMIX model performance vis--vis available laboratory and field data on mixing processes. "Benchmarks" represent a set of performance standards for evaluation. Note: Please make sure pop-ups are enabled, to view the benchmark cases below.


# Title Graph Type View Reference
1. Concentration Intermittency Radial Distance (r/Lambda*b) vs. Intermittency (Gamma) View Jirka (2004) EFM 4:1-56 Fig.3a - Concentration Intermittency
2. Maximum/Minimum Concentration Values Radial Distance (r/Lambda*b) vs. Max./Min. Concentration (cmax/cc)/(cmin/cc) View Jirka (2004) EFM 4:1-56 Fig.3b - Maximum/Minimum Concentration Values
3. Pure Jet Downstream X (X/D0) vs. Decay in Centerline Velocity (Uc/U0) View Jirka (2004) EFM 4:1-56 Fig.4 - Pure Jet
4. Pure Jet Downstream X (X/D0) vs. Bulk Dilution View Jirka (2004) EFM 4:1-56 Fig.5 - Pure Jet
5. Vertical Buoyant Jet in Stagnant Ambient Height Z (Z/LM) vs. Centerline Dilution Sc (Sc/F0) View Jirka (2004) EFM 4:1-56 Fig.6 - Vertical Buoyant Jet in Stagnant Ambient
6. Vertical Buoyant Jet Transition in Stagnant Ambient Height Z (Z/LM) vs. Inverse Centerline Velocity (Mo^(1/2)/(Uc*Z)) View Jirka (2004) EFM 4:1-56 Fig.7 - Vertical Buoyant Jet Transition in Stagnant Ambient
7. Jet/Wake Transition in Ambient Co-flow Downstream X (X/Lme) vs. Decay in Centerline Velocity (Uc/Ua) View Jirka (2004) EFM 4:1-56 Fig.8a - Jet/Wake Transition in Ambient Co-flow
8. Jet/Wake Transition in Ambient Co-flow Downstream X (X/Lme) vs. Increase in Jet Width (b/Lme) View Jirka (2004) EFM 4:1-56 Fig.8b - Jet/Wake Transition in Ambient Co-flow
9. Advected Line Puff Downstream X (X/Lmt) vs. Height Z (Z/Lmt) View Jirka (2004) EFM 4:1-56 Fig.9a - Advected Line Puff
10. Advected Line Puff Height Z (Z/Lmt) vs. Centerline Dilution Sc (Sc*Q0/(Ua*Lmt^2)) View Jirka (2004) EFM 4:1-56 Fig.9b - Advected Line Puff
11. Advected Line Thermal Downstream X (X/Lb) vs. Height Z (Z/Lb) View Jirka (2004) EFM 4:1-56 Fig.10a - Advected Line Thermal
12. Advected Line Thermal Height Z (Z/Lb) vs. Centerline Dilution Sc (Sc*Q0/(Ua*Lb^2)) View Jirka (2004) EFM 4:1-56 Fig.10b - Advected Line Thermal
13. Horizontal Buoyant Jet in Stagnant Ambient Downstream X (X/LM) vs. Height Z (Z/LM) View Jirka (2004) EFM 4:1-56 Fig.11 - Horizontal Buoyant Jet in Stagnant Ambient
14. Horizontal Buoyant Jet in Stagnant Ambient Height Z (Z/LM) vs. Centerline Dilution Sc (Sc/F0) View Jirka (2004) EFM 4:1-56 Fig.12 - Horizontal Buoyant Jet in Stagnant Ambient
15. Buoyant Jet Entrainment Local Buoyancy (Fl^2/sin theta) vs. Alpha (alpha) View Jirka (2004) EFM 4:1-56 Fig.13 - Buoyant Jet Entrainment
16. Vertical Negatively Buoyant Jet in Stagnant Ambient Froude Number F0 vs. Max Rise Height Zm (Zm/D0) View Jirka (2004) EFM 4:1-56 Fig.14 - Vertical Negatively Buoyant Jet in Stagnant Ambient
17. Inclined Negatively Buoyant Jet in Stagnant Ambient Downstream X (X/D0) vs. Height Z (Z/D0) View Jirka (2004) EFM 4:1-56 Fig.15 - Inclined Negatively Buoyant Jet in Stagnant Ambient
18. Horizontal Momentum Sources in Stagnant Linearly Stratified Environment Downstream X (X/Lm') vs. Centerline Dilution (ScLQ/Lm') View Jirka (2004) EFM 4:1-56 Fig.16 - Horizontal Momentum Sources in Stagnant Linearly Stratified Environment
19. Buoyant Jet in Stagnant Linearly Stratified Environment Downstream X (X/D0) vs. Height Z (Z/D0) View Jirka (2004) EFM 4:1-56 Fig.17 - Buoyant Jet in Stagnant Linearly Stratified Environment
20. Buoyant Jet in Stagnant Linearly Stratified Environment Downstream X (X/D0) vs. Height Z (Z/D0) View Jirka (2004) EFM 4:1-56 Fig.18a - Buoyant Jet in Stagnant Linearly Stratified Environment
21. Buoyant Jet in Stagnant Linearly Stratified Environment Downstream X (X/D0) vs. Height Z (Z/D0) View Jirka (2004) EFM 4:1-56 Fig.18b - Buoyant Jet in Stagnant Linearly Stratified Environment
22. Buoyant Jet in Stagnant Linearly Stratified Environment Downstream X (X/D0) vs. Height Z (Z/D0) View Jirka (2004) EFM 4:1-56 Fig.19a - Buoyant Jet in Stagnant Linearly Stratified Environment
23. Buoyant Jet in Stagnant Linearly Stratified Environment Downstream X (X/D0) vs. Dilution S (C0/c) View Jirka (2004) EFM 4:1-56 Fig.19b - Buoyant Jet in Stagnant Linearly Stratified Environment
24. Non-Buoyant Jets in Transverse Crossflow Downstream X (X/D0) vs. Height Z (Z/D0) View Jirka (2004) EFM 4:1-56 Fig. 20 - Non-Buoyant Jets in Transverse Crossflow
25. Non-Buoyant Jets in Transverse Crossflow Downstream X (X/Lm) vs. Height Z (Z/Lm) View Jirka (2004) EFM 4:1-56 Fig. 21 - Non-Buoyant Jets in Transverse Crossflow
26. Non-Buoyant Jets in Transverse Crossflow Height Z (Z/Lm) vs. Centerline Dilution Sc (ScLQ/Lm) View Jirka (2004) EFM 4:1-56 Fig. 22 - Non-Buoyant Jets in Transverse Crossflow
27. Non-Buoyant Jets Discharging at Oblique Angles into or against Ambient Flow Downstream X (X/D0) vs. Height Z (Z/D0) View Jirka (2004) EFM 4:1-56 Fig. 23 - Non-Buoyant Jets Discharging at Oblique Angles into or against Ambient Flow
28. Opposing Non-Buoyant Jets against Ambient Flow Upstream X (X/D0) vs. Absolute Centerline Velocity Decay ((Uc-Ua)/U0) View Jirka (2004) EFM 4:1-56 Fig. 24a - Opposing Non-Buoyant Jets against Ambient Flow
29. Opposing Non-Buoyant Jets against Ambient Flow Upstream X (X/D0) vs. Growth in Visual Jet Width (b*2^(1/2)/D0) View Jirka (2004) EFM 4:1-56 Fig. 24b - Opposing Non-Buoyant Jets against Ambient Flow
30. Vertical Buoyant Jet into Crossflow Downstream X (X/D0) vs. Height Z (Z/D0) View Jirka (2004) EFM 4:1-56 Fig.25a - Vertical Buoyant Jet into Crossflow
31. Vertical Buoyant Jet into Crossflow Buoyant Jet Path (s/D0) vs. Half-Velocity Width (b(1/2)/D0) View Jirka (2004) EFM 4:1-56 Fig.25b - Vertical Buoyant Jet into Crossflow
32. Vertical Buoyant Jet into Crossflow Downstream X (X/D0) vs. Height Z (Z/D0) View Jirka (2004) EFM 4:1-56 Fig.26 - Vertical Buoyant Jets into Crossflow
33. Vertical Buoyant Jets into Crossflow Downstream X (X/Lb) vs. Height Z (Z/Lb) View Jirka (2004) EFM 4:1-56 Fig.27 - Vertical Buoyant Jets into Crossflow
34. Vertical Buoyant Jet into Crossflow Height Z (Z/Lb) vs. Centerline Dilution Sc (Sc*LQ*Lm/Lb) View Jirka (2004) EFM 4:1-56 Fig.28 - Vertical Buoyant Jets into Crossflow
35. Horizontal Buoyant Jet in Co-flow Downstream X (X/D0) vs. Height Z (Z/D0) View Jirka (2004) EFM 4:1-56 Fig.29a - Horizontal Buoyant Jet in Co-flow
36. Horizontal Buoyant Jet in Co-flow Downstream X (X/D0) vs. Dilution S (C0/c) View Jirka (2004) EFM 4:1-56 Fig.29b - Horizontal Buoyant Jet in Co-flow
37. Negatively Buoyant Jet into Crossflow Downstream X (X/D0) vs. Height Z (Z/D0) View Jirka (2004) EFM 4:1-56 Fig.30a - Negatively Buoyant Jet into Crossflow
38. Negatively Buoyant Jet into Crossflow Buoyant Jet Path (s/D0) vs. Half-Velocity Width (b(1/2)/D0) View Jirka (2004) EFM 4:1-56 Fig.30bi - Negatively Buoyant Jet into Crossflow
39. Negatively Buoyant Jet into Crossflow Buoyant Jet Path (s/D0) vs. Centerline Dilution Sc View Jirka (2004) EFM 4:1-56 Fig.30bii - Negatively Buoyant Jet into Crossflow
40. Negatively Buoyant Jet into Crossflow Downstream X (X/D0) vs. Height Z (Z/D0) View Jirka (2004) EFM 4:1-56 Fig.31 - Negatively Buoyant Jets into Crossflow
41. Buoyant Jet Discharging Horizontally Transverse into Crossflow Downstream X (X/D0) vs. Lateral Y (Y/D0) View Jirka (2004) EFM 4:1-56 Fig.32a - Buoyant Jet Discharging Horizontally Transverse into Crossflow
42. Buoyant Jet Discharging Horizontally Transverse into Crossflow Buoyant Jet Path (s/D0) vs. Centerline Dilution Sc View Jirka (2004) EFM 4:1-56 Fig.32bi - Buoyant Jet Discharging Horizontally Transverse into Crossflow
43. Buoyant Jet Discharging Horizontally Transverse into Crossflow Buoyant Jet Path (s/D0) vs. Half-Velocity Width (b(1/2)/D0) View Jirka (2004) EFM 4:1-56 Fig.32bii - Buoyant Jet Discharging Horizontally Transverse into Crossflow
44. Vertical Buoyant Jet into Stratified Crossflow Downstream X (X/D0) vs. Height Z (Z/D0) View Jirka (2004) EFM 4:1-56 Fig.33a - Vertical Buoyant Jet into Stratified Crossflow
45. Vertical Buoyant Jet into Stratified Crossflow Downstream X (X/D0) vs. Centerline Density Anomaly ((Pa-Pc)/Pa) View Jirka (2004) EFM 4:1-56 Fig.33b - Vertical Buoyant Jet into Stratified Crossflow
46. Vertical Buoyant Jet into Stratified Crossflow Downstream X (X/D0) vs. Height Z (Z/D0) View Jirka (2004) EFM 4:1-56 Fig.34a - Vertical Buoyant Jet into Stratified Crossflow
47. Vertical Buoyant Jet into Stratified Crossflow Downstream X (X/D0) vs. Centerline Density Anomaly ((Pa-Pc)/Pa) View Jirka (2004) EFM 4:1-56 Fig.34b - Vertical Buoyant Jet into Stratified Crossflow