Senior CFD Simulation Design Engineer BESS

Larsen & Toubro; Bengaluru; On-site; INR 2,500,000 - 4,000,000; Full time

Job summary

Larsen & Toubro is searching for a Senior Design Engineer to lead Thermal CFD Simulation for BESS. You will own virtual thermal validation of battery systems, enclosures, and cooling architectures, guiding design decisions and reducing physical testing.

Experience with CFD tools (Ansys Fluent, Icepak, Star-CCM+, SIMcenter) and a strong background in heat transfer, fluids, and turbulence are essential. Expect cross-functional collaboration in a fast-paced environment.

Qualifications

• 8–12 years of experience in thermal CFD simulation for batteries, power electronics, or energy systems.
• Strong fundamentals in heat transfer, fluid dynamics and turbulence modeling.
• Hands-on expertise with CFD tools such as Ansys Fluent/Icepak, Star-CCM+, SIMcenter.

Responsibilities

• Lead thermal modeling and CFD simulations for utility-scale and BESS.
• Own virtual thermal validation of battery systems, enclosures, and cooling architectures.
• Correlate CFD results with experimental data and support FAT/SAT/commissioning.

Skills

Thermal CFD simulation

Heat transfer

Fluid dynamics

Turbulence modeling

Ansys Fluent

Icepak

Star-CCM+

SIMcenter

Battery thermal modeling

CFD automation scripting

Education

Bachelor/Master in Mechanical/Aerospace

Tools

Ansys Fluent

Icepak

Star-CCM+

SIMcenter

Job description

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 models to 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

• Strong 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.