Aerodynamic Drag Reduction for a Generic Truck Using Geometrically Optimized Rear Cabin Bumps

Table 1

Physical parameters.

Physical properties	Parameters
Flow characteristics	Steady, stationary, incompressible, turbulent, segregated flow with energy solver, RANS
Solver type	Pressure-based
Turbulence model	-epsilon, realizable
Near-wall treatment	Nonequilibrium wall function
Inlet flow velocity	30 m/s
Outlet pressure	1 atm
Solution methods	(i) Pressure-velocity coupling: SIMPLE scheme; (ii) Spatial discretization: gradient (least square cell based), pressure (standard), momentum (Second-Order Upwind), turbulent kinetic energy (Second-Order Upwind), turbulent dissipation rate (Second-Order Upwind)