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In order to spread market opportunities, Volkswagen do Brasil Ltda - Truck and Bus Operation has adopted in conjunction with T-Systems do Brasil Ltda computer-aided analysis techniques that have been revolutionized engineering design in several important areas, notably in the optimization of systems where heat transfer and fluid flow are present. The main goal is to reduce the lead time to develop a new system and to obtain a better understanding of the physical aspects of the phenomenon involved. The proposed paper aims to present the numerical simulation of the flow around two wheel systems, for a new Volkswagen Truck. The main practical application of this investigation is to evaluate the air flow assessment in the region of the brake system and determine flow rate and global heat transfer coefficient. With this study, it is possible to decide which wheel system is more efficient from the brake refrigeration point of view.

The proposed paper aims to present the numerical simulation via CFD of the underhood flow for a given DaimlerChrysler truck. The main practical application of this investigation is to evaluate the air flow assessment in the underhood compartment. All the relevant aspects of the flow have been taken into account and fully 3D incompressible viscous flow simulations with turbulence modeling for steady state condition has been performed. As regards truck operation conditions, two major situations have been considered: firstly, one simulation with the truck at a standstill condition. Secondly, the movement of the truck is considered for a condition of maximum torque.

The proposed paper aims to present the numerical simulation of the thermal comfort for a given DaimlerChrysler truck. The starting point of this paper took into consideration the results originated in the paper: “Numerical simulation of a truck underhood flow”. The main practical application of this investigation is to evaluate the thermal comfort inside the cabin, throughout the distribution of cabin floor heat flux. Very high temperatures from some engine components such as turbine must be adequately taken care of, otherwise they may lead to high spot temperatures on the cabin floor and cause discomfort to the vehicle occupants.