STAR-CCM+ + TAITherm Cabin HVAC Thermal Comfort Debug/Fix

Automotive Cabin Heating Thermal Comfort Simulation Fix (STAR-CCM+ .sim + TAITherm Human Thermal / Berkeley Comfort)

We are looking for an engineer who can run and troubleshoot an automotive cabin heating thermal comfort simulation using:

- Simcenter STAR-CCM+ (.sim) for cabin airflow/temperature fields
- TAITherm Human Thermal / HTE + Berkeley Comfort for occupant comfort outputs

Task goal (what you need to deliver)
We have a simplified cabin model. Under a cold ambient heating scenario, the current results are abnormal: occupant thermal sensation/comfort improves briefly and then becomes colder again (e.g., TS drops toward -1 and continues decreasing). We need you to diagnose the root cause and correct the model setup/coupling/mapping so the outputs are physically reasonable.

Target requirements (high level):
- Transient duration: 1800 s (30 min)
- Monitoring temperatures: foot/foot-vent zone around ~35°C, head point around ~20°C (exact monitor definitions will be shared privately)
- Comfort trend: overall thermal sensation & comfort must be normal/stable (after heating ramps up, it should not “get colder again”)

What we expect from you
- Identify why comfort trend becomes colder (typical causes include MRT/radiation boundary, incorrect field-to-human mapping of Ta/Tr/velocity/RH, initialization/restart issues, boundary leakage on cut surfaces, etc.)
- Provide corrected settings + clear explanation of what was wrong and what you changed
- Provide plots/outputs for monitoring temperatures + comfort metrics (TS/PMV/PPD or equivalent)

Required experience (please do NOT apply if you don’t have this)
- Hands-on experience with STAR-CCM+ transient cabin HVAC/thermal
- Hands-on experience with TAITherm Human Thermal / Berkeley Comfort (not only CFD)
- Ability to actually run the case (access to software/licenses or a workable setup)

Confidentiality
Due to confidentiality, we will share the detailed model files and full requirement document after you confirm capability.

Please answer these in your proposal:

1) Have you used TAITherm Human Thermal / HTE + Berkeley Comfort in real projects? Share 1–2 lines of what you did (no confidential details).
2) Do you have access to STAR-CCM+ and TAITherm comfort/human modules to run the model? (Yes/No)
3) List your top 3 likely causes when cabin heating comfort “gets colder again” (keywords are fine: MRT/radiation, mapping, restart/initialization, boundary condition, cut-surface leakage, etc.)
4) What is your estimated time (days) to deliver corrected results + explanation?
5）Tell me how much you would charge for my task.

——————————

Keywords: STAR-CCM+ .sim, Simcenter, cabin HVAC heating, automotive thermal management, TAITherm 2020, ThermAnalytics, Human Thermal Model, Human Modeling Extension (HTE), Berkeley Comfort Model, thermal sensation (TS), PMV, PPD, MRT (mean radiant temperature), radiation boundary, coupling/mapping, transient 1800s, monitoring points, HDF5 .tdf, .vfs .slf .tlf
- Simcenter STAR-CCM+ (Transient / CHT / Radiation)
- TAITherm / RadTherm (Human Thermal / HTE)
- Thermal Comfort / Berkeley Comfort / PMV-PPD
- Automotive HVAC / Cabin Thermal Management
- CFD Post-processing / Data analysis (HDF5)