Flow body for a vehicle , comprising: a recess , which is provided in the form of a depression in a surface of the flow body ; wherein the recess extends along a main flow direction , which is defined by a flow direction of a fluid flowing over the surface of the flow body ; wherein the recess comprises a front recess region and a rear recess region , wherein the front recess region is arranged upstream of the rear recess region in the main flow direction ; a first structural component with a porous material; a second structural component with a porous material; wherein the second structural component is arranged in, or on, the rear recess region ; wherein the first structural component is arranged in, or on, the front recess region , so that the first structural component is arranged spatially separately from the second structural component ; wherein the first structural component has a sponge-like structure with pores and channels ; wherein the pores and channels are configured to allow a first part of the fluid flowing over the surface of the flow body to flow through the first structural component ; wherein the first structural component comprises a flow-influencing portion which projects from the surface of the flow body ; wherein the flow-influencing portion of the first structural component exhibits a wedge shape; wherein the second structural component exhibits a cuboid shape and is arranged in the rear recess region in such a manner that the second structural component terminates flush with the surface of the flow body ; wherein the pores and channels of the first structural component extend over the entire extent of the first structural component along the main flow direction to allow a first part of the fluid flowing over the surface of the flow body to flow through the first structural component . a recess , which is provided in the form of a depression in a surface of the flow body ; wherein the recess extends along a main flow direction , which is defined by a flow direction of a fluid flowing over the surface of the flow body ; wherein the recess comprises a front recess region and a rear recess region , wherein the front recess region is arranged upstream of the rear recess region in the main flow direction ; a first structural component with a porous material; a second structural component with a porous material; wherein the second structural component is arranged in, or on, the rear recess region ; wherein the first structural component is arranged in, or on, the front recess region , so that the first structural component is arranged spatially separately from the second structural component ; wherein the first structural component has a sponge-like structure with pores and channels ; wherein the pores and channels are configured to allow a first part of the fluid flowing over the surface of the flow body to flow through the first structural component ; wherein the first structural component comprises a flow-influencing portion which projects from the surface of the flow body ; wherein the flow-influencing portion of the first structural component exhibits a wedge shape; wherein the second structural component exhibits a cuboid shape and is arranged in the rear recess region in such a manner that the second structural component terminates flush with the surface of the flow body ; wherein the pores and channels of the first structural component extend over the entire extent of the first structural component along the main flow direction to allow a first part of the fluid flowing over the surface of the flow body to flow through the first structural component . <EOS>