The effect of local heating on particle deposition in an evaporating colloidal sessile droplet is investigated numerically. A computer code is developed and implemented to simulate the coupled phenomena of flow and heat and mass transfer with phase change of the evaporation sessile droplet. The corresponding numerical model considers evaporative cooling effect, surface tension gradient effect at the liquid-air interface and buoyancy effect in the fluid phases. Results shows that particle deposit is controlled by the liquid motion inside the droplet. When the solid surface of substrate is subject to partly isothermal and adiabatic boundary conditions, multicellular flows with different orientations develop inside the droplet. With preponderant thermos-capillary effect, the particle concentration is pronounced at the drop center. An isothermal solid surface amplifies this effect whereas an adiabatic surface yields a more uniform particle concentration at the substrate surface.