Senior Design Engineer –

- Thermal CFD Simulation (BESS)

Location: Bengaluru, India

Experience: 8–12 Years

Function: BESS Product Engineering –

- Simulation &
- Analysis

About The Role

We are seeking a Senior Design Engineer –

- Thermal CFD Simulation to lead advanced thermal modeling and CFD simulations for utility?scale and commercial & industrial Battery Energy Storage Systems (BESS).

In this role, you will own the virtual thermal validation of battery systems, enclosures, and cooling architectures and real system development. You will play a critical role in guiding design decisions, reducing physical test iterations, and improving safety, reliability, and performance of stationary storage products.

Key Responsibilities

Thermal Modeling &

- CFD Simulation

- Develop and execute CFD modelsto analyze:
- Battery module and rack thermal behavior
- Container?level airflow and liquid cooling performance
- Hot?spot formation and temperature gradients

- Perform steady?state and transient thermal simulations under:

- Normal operation
- High?power and long?duration load profiles
- Environmental extremes and fault scenarios

Design Support &

- Optimization

- Support thermal and mechanical teams with simulation?driven design guidance.
- Electro –
- Mechanical component thermal Analysis
- Evaluate and compare cooling concepts and layouts using CFD.
- Analyse flow patterns and temperature distributions to optimize cooling, reduce hotspots, and improve system efficiency.
- Optimize airflow, ducting, cooling plate, and cold?plate designs for performance and efficiency.
- Provide actionable recommendations balancing performance, cost, and manufacturability.

Correlation &

- Validation

- Correlate CFD results with experimental and field test data.
- System level -Model Generation.
- Improve model accuracy through continuous validation.
- Support thermal design verification during FAT, SAT, and commissioning phases.





System?Level Analysis

- Contribute to system?level thermal trade studies for:
- Utility?scale containerized BESS
- Indoor and outdoor C&I; installations

- Assess impact of thermal behavior on:

- Battery life
- System derating
- Safety margins

- Perform steady-state and transient 3D CFD/thermal simulations, focusing on Electrical /Electronic cooling, heat sinks,HVAC and air/liquid cooling systems.

Technical Leadership &

- Collaboration

- Act as CFD subject?matter expert within the BESS engineering team.
- Mentor junior simulation engineers and review analysis outputs.
- Collaborate with battery, thermal design, mechanical, and system engineering teams.

Required Skills &

- Experience

Core Technical Skills

- 8–12 years of experience in thermal CFD simulation for batteries, power electronics, or energy systems.
- Strong fundamentals in:
- Heat transfer
- Fluid dynamics
- Turbulence modeling

- Hands?on expertise with CFD tools such as:

- Ansys Fluent / Icepak
- Star?CCM+
- SIMcenter
- Similar commercial CFD platforms

- Experience modeling battery thermal behavior (lumped or detailed approaches).

System &

- Product Experience

- Experience supporting stationary energy storage or similar large?scale energy systems preferred.
- Understanding of thermal challenges in high?energy, long?duration battery systems.
- Ability to interpret simulation results in the context of real?world operational constraints.

Preferred Qualifications

- Bachelor’s or Master’s degree in Mechanical, Thermal, or Aerospace Engineering.
- Experience with:
- CFD automation or scripting
- Multiphysics simulations (thermal?electrical coupling desirable)

- Familiarity with stationary storage codes and standards (IEC / UL).

Soft Skills

- Solid analytical and modeling mindset.
- Ability to clearly communicate complex simulation results to non?CFD stakeholders.
- Ownership mentality and attention to detail.
- Comfortable working in a fast?paced, product?driven environment.

📌 Senior CFD Simulation Design Engineer BESS (Bengaluru)
🏢 Larsen u0026 Toubro
📍 Bengaluru