Computationswereperformedtoinvestigatee owpaststationarysphericalparticleswithandwithoutanimposed sinusoidal e uctuation in the streamwise velocity upstream of the particles at two different particle Reynolds numbers(50 and100). When there is an imposed velocity e uctuation, the amplitude of the velocity e uctuation was keptat0.05ofthemeanvelocitymagnitude,ande vewavelengths (2D, 4D,5D,7D,10D;Disparticlediameter )were investigated. The focus of the computations is to understand how wavelength of velocity e uctuation affects drag, surface pressure, and surface shear for the following three particle problems: 1 )an isolated single particle, 2 )four particles-in-tandem along the e uctuating-e ow direction, and 3 ) an array of particles arranged in a nonstaggered fashion. Results show the drag, friction, and pressure coefe cients to be strong functions of the wavelength of velocity e uctuation. Also, the e uctuating velocity was found to change the point of e ow separation. For the single particle problem, velocity e uctuations were found to increase the drag coefe cient. For the problems involving particles in tandem and an array of particles, velocity e uctuations were found to decrease the drag coefe cient due to particle interactions. This study is based on the conservation equations of mass, momentum (full compressible Navier‐Stokes), and energy for three-dimensional, unsteady, laminar e ows of an ideal gas with constant specie c heats.Solutionsweregenerated by usinga second-order-accuratee nitevolumemethodbasedonNewton ‐Raphson iteration and a diagonalized alternating-direction implicit scheme on overlapped grids.