Investigating the sublimation characteristics of dry ice particles subjected to convective heating in an unsaturated gaseous medium is crucial for applications involving cooling using dry ice sprays. As a model problem, this study experimentally and numerically investigates the sublimation of an isolated dry ice sphere in a controlled gas flow environment. Schlieren imaging is employed in the experiments to visualize density gradients at the dry ice-gas interface and track the boundary of the sublimating sphere. Additionally, a numerical simulation using COMSOL Multiphysics software is conducted to model the shrinkage of the sublimating sphere, taking into account heat, mass, and momentum transport phenomena in the gas surrounding the dry ice sphere. Qualitative comparisons between the experimental and numerical results are presented, with a specific focus on density gradients at different times and varying CO₂ concentrations in the gas domain. The preliminary research presented in this paper aims to bridge the gap in understanding the sublimation phenomena of solid particles and provide valuable insights for engineering applications involving dry ice sprays.