Lennart Löfdahl

2022

Multiphysics simulation optimization framework for lithium-ion battery pack design for electric vehicle applications

Lithium-ion Battery Pack Design for Electric Vehicles Using GT-AutoLion: Multi-Physics Simulation and Multi-Criteria Optimization Approach

Connection between rear-end extensions and yaw response of a passenger vehicle

2020

Calibration Optimization Methodology for Lithium-Ion Battery Pack Model for Electric Vehicles in Mining Applications

Lithium-Ion Battery Pack Modelling for Electric Vehicles in Mining Applications Using GT-AutoLion

A numerical investigation of thermal engine encapsulation concept for a passenger vehicle and its effect on fuel consumption

2019

A Coupled 1D–3D Numerical Method for Buoyancy-Driven Heat Transfer in a Generic Engine Bay

Numerical investigation of crossflow separation on the a-pillar of a passenger car

Experimental Investigation of the Near Wall Flow Downstream of a Passenger Car Wheel Arch

Aerodynamic Analysis of Cooling Airflow for Different Front-End Designs of a Heavy-Duty Cab-Over-Engine Truck

2017

Experimental and numerical investigations of cooling drag

2017

Force Based Measurement Method for Cooling Flow Quantification

Quantitative Tuft Flow Visualization on the Volvo S60 under realistic driving Conditions

Surface Flow Visualization on a Full-Scale Passenger Car with Quantitative Tuft Image Processing

On the Possibilities and Limitations of Wind Noise Testing in the Aerodynamical Wind Tunnel at Volvo Cars

Numerical Investigation of Natural Convection in a Simplified Engine Bay

Flow Structure Identification over a Notchback Vehicle

Qualitative tuft flow visualization on the volvo S60 under realistic driving conditions

2016

Numerical implementation of Detached Eddy Simulation on a passenger vehicle and some experimental correlation

2016

Investigations of the Rear-End Flow Structures on a Sedan Car

Vehicle Aerodynamics and Thermal Management in Future Hybrid and Electrical Vehicles

Theorie und Grundlagen der Stromlinje – Fahrzeugaerodynamik heute – Wohin geht der weg?, Strom Linien Form - Die Faszination des geringen Widerstands

Wheel housing aerodynamics on heavy trucks

Wake and Unsteady Surface-Pressure Measurements on an SUV with Rear-End Extensions

2015

Experimental investigation of heat transfer rates and pressure drops through compact heat exchangers: Where the Heat Exchanger is Angled Relative to the Incoming Airflow

On the Aerodynamic Performance of two Silver Arrows from the Thirties

Numerical and Experimental Investigations of Brake Cooling for Passenger Cars

CFD Simulations of one Period of a Louvered Fin where the Airflow is Inclined Relative to the Heat Exchanger

Structures of Flow Separation on a Passenger Car

A 1D Method for Transient Simulations of Cooling Systems with Non-Uniform Temperature and Flow Boundaries Extracted from a 3D CFD Solution

2014

Investigation of vehicle ride height and wheel position influence on the aerodynamic forces of ground vehicles

Investigation of three-dimensional flow separation patterns and surface pressure gradients on a notchback vehicle

Effect of the traversing unit on the flow structures behind a passenger vehicle

A Computational Investigation of Ground Simulation for a Saloon Car

Influence of Rims and Tyres on the Aerodynamic Resistance of Passenger Vehicles

Experimental Investigation of Heat Transfer Rates and Pressure Drops through Compact Heat Exchangers

2014

Study of different tyre simulation methods and effects on passenger car aerodynamics

Study of Software Integration for Transient Simulation of Future Cooling System for Heavy Truck Application

Experimental Investigation of Heat Transfer Rate and Pressure Drop through Angled Compact Heat Exchangers Relative to the Incoming Airflow

Investigation of Wheel Aerodynamic Resistance of Passenger Cars

Effect of rear-end extensions on the aerodynamic forces of an SUV

Vehicle Aerodynamics and Thermal Management in Future Hybrid and Electrical Vehicles

Comparative Studies between CFD and Wind Tunnel Measurements of Cooling Performance and External Aerodynamics for a Heavy Truck

CFD simulation and experimental investigation of pressure-drop through 90° and 30° angled compact heat-exchangers relative to the oncoming airflow

CFD Method and Simulations on a Section of a Detailed Multi-Louvered Fin where the Incoming Air is Directed at 90° and 30° Relative to the Compact Heat-Exchanger

Experimental and Numerical Investigations of the Base Wake on an SUV

Performance of an Automotive Under-Body Diffuser Applied to a Sedan and a Wagon Vehicle

2013

Investigation of Wheel Ventilation-Drag using a Modular Wheel Design Concept

Yaw- and Trailer Dependence for Rear-Mounted Cooling Installations for Heavy Vehicles

Aerodynamic Investigation of Gap Treatment- and Chassis Skirts Strategies for a Novel Long-Haul Vehicle Combination

Experimental and Numerical Investigation of Wheel Housing Aerodynamics on Heavy Trucks

Aerodynamic Wheel Force Measurements on a Detailed Scale-Model Car – Possibilities and Challenges

Aerodynamics of passenger vehicles - bluff bodies

Fordonsaerodynamik - trubbig kropp

Experimental and Numerical Investigation of Wheel Housing Aerodynamics on Heavy Trucks

Aerodynamic Effects of Different Tire Models on a Sedan Type Passenger Car

Road Vehicle Aerodynamics at Chalmers University and Forces Acting on the Rotating Wheel

Alternative Approach in Ground Vehicle Wake Analysis

Influence of a Diffuser to the Wake Flow of a Passenger Car

Continuing Cooling Performance Investigation of a Rear Mounted Cooling Package for Heavy Vehicles

Aerodynamic Effects of Roof Deflector and Cab Side Extenders for Truck-Trailer Combinations

Cooling Performance Investigation of a Rear Mounted Cooling Package for Heavy Vehicles

Role of Aerodynamics and Thermal Management in the Vehicles of Tomorrow

Fan Modelling in CFD Using RANS with MRF, Limitations and Consistency, a Comparison between Fans of Different Design

Wing-diffuser interaction on a sports car

Cooling Airflow System Modeling in CFD Using Assumption of Stationary Flow

Wing-Diffuser Interaction on a Sports Car

Influences of Different Front and Rear Wheel Designs on Aerodynamic Drag of a Sedan Type Passenger Car

FAN MODELING IN CFD USING MRF MODEL FOR UNDER HOOD PURPOSES

Influence of Different Truck and Trailer Combinations on the Aerodynamic Drag

Investigation of Aerodynamic Wheel Designs on a Passenger Car at Different Cooling Air Flow Conditions

DRAG AND LIFT MEASUREMENTS OF FOUR BLUFF BODIES

Effects of wheel orientation on predicted flow field and forces when modelling rotating wheels using CFD

WAKE MEASUREMENT OF A SIMPLE BLUFF BODY WITH VARYING REAR END DESIGN AND CLOSE PROXIMITY TO GROUND

Wheel Housing Aerodynamics on Heavy Trucks

Effects of Ground Simulation on the Aerodynamic Coefficients of a Production Car in Yaw Conditions

Secondary instability of a swept-wing boundary layer disturbed by controlled roughness elements

Wheel Aerodynamic Developments on Passenger Cars by Module-based Prototype Rims and Stationary Rim Shields

Flow Field Investigation of the Wheel Housing Opening Shape on Heavy Truck Using CFD

Interference between engine bay flow and external aerodynamics of road vehicles

Continued Study of the Error and Consistency of Fan CFD MRF Models

Investigation of the cooling and underbody flow field on a detailed model scale passenger car. Part 1 - Cooling flows and Reynolds number effects

Detailed flow studies in close proximity of rotating wheels on a passenger car

Experimental Investigations of the Drag Reduction on a Generic Tractor-Trailer Configuration Using Active Flow Control in Combination with Solid Flaps

A Correction Method for Stationary Fan CFD MRF Models

INVESTIGATION OF THE COOLING AND UNDERBODY FLOW FIELD ON A DETAILED SCALE MODEL PASSENGER CAR - PART 2: EFFECT OF GROUND SIMULATION

The Aerodynamics of Cooling Air Inlets of Road Vehicles

Optimizing the Cooling Air Flow of a Formula Car Using CFD

An Investigation of the Aerodynamic Drag Mechanisms due to Ground Simulation in Yawed Flow Conditions for Heavy Trucks

A Numerical Investigation of the Influence of Moving Ground and Rotating Wheels on Heavy Duty Vehicle Cooling Performance

FLOW FIELD AROUND AND IN A SAAB 9-3 CONVERTIBLE

Lägre bränsleförbrukning med hjälp av vindtunneltestning

Heavy Vehicle Wheel Housing Flows - a Parametric Study

An Investigation and Correction Method of Stationary Fan CFD MRF Simulations

Drag Reduction of a Simple Bluff Body by Changing The Rear End

Implementing Advanced CAE Tools in Automotive Engineering Education at Chalmers University of Technology

High Level Geometry Restoration for CFD Purposes in ANSA

Influence of Aerodynamics on the Fatal Crash in Le Mans 1955

Moving Ground Effects on the Wheelhouse Flows of Heavy Vehicles

Cooling Flow Optimization

3D fan modelling strategies for heavy duty vehicle cooling installations - CFD with experimental validation

Drag Reduction of Long Haulage Trucks

Development of a Model Scale Heat Exchanger for Wind Tunnel Models of Road Vehicles

The Role of Aerodynamics in the 1955 Le Mans Crash

Influence of Moving Ground Conditions on the Cooling Flows of Road Vehicles

Improving the Cooling Airflow of an Open Wheeled Race Car

The L2 Model Scale Wind Tunnel at Chalmers University of Technology

On investigation of sinusoidal and varicose instabilities of streaks in boundary layers

Flow field investigation around a convertible passenger car using CFD and experiments

The L2 Wind Tunnel at Chalmers University of Technology

Initial Experimental Investigation of the Local Flow Field Around Rotating Wheels using an Omni-probe

Designing a course for future designers, Advantage – excellence in Engineering Simulation

Numerical validations of secondary flows and loss development downstream of a highly loaded low pressure turbine outlet guide vane cascade

Reynolds Effects in Cooling Airflow

Using CFD in the Design of a Model Scale Radiator

Aerodynamic Development and Evaluation of a Formula SAE Car Using Numerical Simulations

Control of Lambda-structure transformation into a turbulent spot by means of riblets

Breakdown of a streak via development of varicose secondary mode on the straight wing with pressure gradient

On nonlinear sinusoidal and varicose instabilities in a boundary layer and their control by riblets

Hot wire visualization of turbulization of complex flows

Performance and Off-Design Characteristics for Low Pressure Turbine Outlet Guide Vanes: Measurements and Calculations

Experiments on streamwise vortices in a swept wing boundary layer and their secondary instability

Features of laminar-turbulent transition of adverse pressure gradient flows at low and high Reynolds numbers

An experimental investigation of secondary flows and loss development downstream of a highly loaded low pressure turbine outlet guide vane cascade

The influence of riblets on the development of a Λ structure and its transformation into a turbulent spot

Visualization of sinusoidal and varicose instabilities of streaks in a boundary layer

WHEEL STRUT INTERFERENCE

Visualization of sinusoidal and varicose instabilities of streaks in a boundary layer

Effect of riblets on nonlinear disturbances in the boundary layer

A study of the Blasius wall jet

Fundamental Fluid Dynamics Relevant to Road Vehicle Aerodynamics (RVAD)

Sensors and actuators for turbulent flows

Nonlinear sinusoidal and varicose instability in the boundary layer

Experimental analysis of the flow-field in a state-of-the-art linear cascade with boundary-layer suction

Nonlinear sinusoidal and varicose instability in a boundary layer

Riblet-assisted control of transformation of the Λ-structure into a turbulent spot

Hybrid-mounted micromachined aluminum hotwires for wall shear stress measurements

Review of visualization techniques in exploration of incompressible shear flows

Experiments on secondary instability of streamwise vortices in a swept wing boundary layer

Fluid mixing induced by vibrating walls

A Brief History of Road Vehicle Aerodynamics (RVAD)

Adverse pressure gradient effect on nonlinear varicose instability of a streaky structure in an unswept wing boundary layer

Hot wire visualizations of breakdown to turbulence in complex flows

Steady streaming due to vibrating walls

Time-resolved wall shear stress measurements using MEMS

Breakdown of a streak via development of varicose secondary mode on the straight wing with pressure gradient

Experimental investigation of a streaky structure varicose instability in a swept wing boundary layer

Nonlinear sinusoidal and varicose instability in the boundary layer (review)

Secondary instability of stationary vortex packets in a swept wing boundary layer

Breakdown of a streak via development of varicose secondary mode on the straight wing with pressure gradient

Control of cross-flow instability on a swept wing by suction

Heat transfer effects due to vibrating walls

A visualization study of the longitudinal structures of a plane wall-jet

Design of a Modern Test-Facility for LPT/OGV flows

A multi-sensor hot-wire anemometer system for investigation of wall-bounded flow structures

Characteristics of a hot wire microsensor for time-dependent wall shear stress measurements

A visualisation study of the longitudinal structures in the near filed of a plane wall-jet

Measurement of the turbulence intensities in a flat plate boundary layer

Control of spanwise flow instability of a swept wing by suction

A numerical and experimental study of the Blasius wall jet

Effect of streamwise vortices on the transition in the boundary layers and jets

Design of a modern test facility for LPT/OGV flows

Sensors and Actuators for Turbulent Flows

Design and Fabrication of MEMS velocity and Pressure Sensors

Role of the streaky structures in a transition mechanism of the boundary layers and jets

MEMS Wall Shear Stress Sensors – Experiments, Theory and Modelling

Hybrid mounted micromachined aluminium hot-wire for near-wall turbulence measurements

An analytical asymptotic solution to a conjugate heat transfer problem

Role of localized streamwise structures in the process of transition to turbulence in boundary layers and jets (review)

Longitudinal structures in boundary layers and jets

The role of streamwise structures in the near-field entrainment of plane jet

Multiwire system for hot-wire measurements in boundary layers

Experimental study of the K-regime of breakdown in straight and swept wing boundary layers

A quantitative flow visualization of a point source disturbance in a swept wing boundary layer

On K-type transition in swept wing boundary layer in the presence of an acoustic field

Experimental study of the K-regime of breakdown in straight and swept wing boundary layers

On the Calculation of Streamwise Derivatives from Single Point Measurements

Experimental study of K-regime of breakdown in straight and swept wing boundary layers

On the Thermal MEMS-Sensors for Wall-Shear Stress Measurements

Patterns of streamwise lambda structures mapped with Mini-CTA hot wire anemometry

On K-type transition in swept wing boundary layer in the presence of an acoustic field

MEMS Applications in Turbulence and Flow Control

A Similarity Theory for the Plane Wall Jet

The use of MEMS in Fluid Dynamics

Pulsed Hot-Wire Measurements in Two- and Three-Dimensional Wall Jets

MEMS based Pressure and Shear Stress Sensors for Turbulet Flows

The Influence of Temperature on the Measurements of Reynolds Stresses in Shear Free Turbulence Near a Wall

A Shear-Free Turbulent Boundary Layer - Experiments and Modeling

Silicon Pressure Transducers used to Determine the Longitudinal Correlation Coefficient in a Flat Plate Boundary Layer

An Integrated Pressure-Velocity Sensor for Correlation Measurements in Turbulent Gas Flows

Analytical Characterisation of Piezoresistive Square Diaphragm Silicon Microphone

An investigation of the turbulence field in the three-dimensional wall jet

A Fast Simple Hot-Wire Method of Determining the Mean Velocity Vector of Complex Three-Dimensional Flows

A Similarity Theory for the Plane Wall Jet

An Integrated Silicon Based Pressure-Shear Stress Sensor for Turbulence Measurements

Small Piezoresistive Silicon Microphones Specially Designed for the Characterization of Turbulent Gas Flows

An Integrated Pressure-Velocity Sensor for Correlation Measurements in Turbulent Gas Flows

A Small-Size Microphone for Turbulence Measurements

Measurements of Turbulent Quantities in Complex Three-Dimensional Boundary Layer Flow

A Turbulent Plane 2-Dimensional Wall-Jet in a Quiescent Surrounding

An Estimate of the Pressure Strain, Rate Tensor in a Plane Cylinder Wake

The Plane Wake of a Cylinder: An Estimate of the Pressure Strain Rate Tensor

Silicon Pressure Transducers used to Determine the Longitudinal Correlation Coefficient in a Flat Plate Boundary Layer

Small Piezoresistive Silicon Microphones specially Designed for the Characterization of Turbulent Gas

Measurement of the Enstrophy and the Vorticity Vector in a Plane Cylinder Wake using a Spectral Method

Using Small Silicon Pressure Transducers to Determine the Longitudinal Space-Time Correlation Coefficient of the Wall Pressure

Small Silicon Based Pressure Transducers for Measurements in Turbulent Boundary Layers

An Integrated Silicon Based Pressure-Shear Stress Sensor for Measurements in Turbulence Flows

On the Reynolds number dependence of a plane two-dimensional wall jet

Determination of Derivative Moments using Two Slanted Hot-Wires and a Spectral method

The Plane Wake of a Cylinder: Measurements and Inferences on Turbulence Modelling

Silicon Based Sensors for the Measurement of Turbulence and Wall-Pressure Fluctuations in a Two-Dimensional Flat Plate Boundary Layer

A Silicon Transducer for the Determination of Wall-Pressure Fluctuations in Turbulent Boundary Layers

Influence of Different Sensor Configurations on the Turbulent Quantities in a Complex Three-Dimensional Flow Field

Studies of the Turbulence Field in a Three-Dimensional Wall-Jet

Turbulence in a Two-Dimensional Wall-Jet - Experiments and Modeling,

Measured and Modelled Component (11) of the Dissipation Rate Tensor

A Silicon Transducer for the Determination of Wall-Pressure Fluctuations in Turbulent Boundary Layers

Silicon Based Flow Sensors for Mean Velocity and Turbulence Measurements

Turbulence Measurements in a Two-Dimensional Wall-Jet

Turbulence in the Vicinity of a Rotating Cylinder in a Quiescent Fluid

Flow Visualization and Turbulence Measurements in a Three-Dimensional Turbulence Wall Jet

Reynolds Stress Measurements using Direction-Sensitive Double-Chip Silicon Sensors

Turbulence Measurements using Double-Chip Silicon Sensors

Turbulence measurements using sensors based on silicon technology

A Sensor Based on Silicon Technology for Turbulence Measurements

Turbulence Measurements in a rotating frame of reference

Hot-Wire Measurements Inside a Centrifugal Fan Impeller

Traverse Mechanisms for the Determination of Reynolds Stresses using Hot-Wire Techniques

Blade cooling in high temperature gas turbines – A review of film cooling and some fundamental results

Flow measurements in a radial fan and other turbomachinery bladings using hot-wires, - Cascade flow calculations using PHENICS

Hot-Wire Techniques for the Determination of the Reynolds Stress Tensor in Three-Dimensional Flows

A comparison of Three Different Hot-Wire Techniques for the Detemination of the Reynolds Stress Tensor

Measurements Near the Stern of a Ship Model

Measurements of Reynolds Stress Profiles in the Stern Region of a Ship Model

Using Single Rotated Hot Wires for Measuring Reynolds Stress in a Three-Dimensional Turbulent Boundary Layer with Considerable Upwash. SSPA Projektrapport nr 2360-3, 1979

Uppmätning av turbulenta skjuvspänningar i tredimensionella gränsskikt med hjälp av varmtrådsanemometri - En sammanställning av olika mätmetoder. Intern skrift nr 78/46. Institutionen för tillämpad termodynamik och strömningslära, 1979.

A Method for’Calculating Thick Three-Dimensional Turbulent Boundary Layers. Part I: Equations and General Principles. SSPA Project Report nr 2360-1, 1979.