<p>A three-dimensional steady-state turbulent flow and solidification model has been developed using the finite volume method (FVM) to examine how cladding materials, preheating temperatures, and substrate strip thicknesses influence fluid flow and heat transfer during the fabrication of bimetallic clad strips via the horizontal single-belt casting (HSBC) process. Whereas effective solidification requires transferring heat from the molten cladding through the substrate strip to the belt, the study found that cladding material and substrate characteristics significantly affect heat transfer,absorption, and thermal resistance, along with process parameters, and the results show that fluid flow stability is closely related to strip quality, with higher-density cladding enabling more uniform melt distribution. Additionally, the heat that can be absorbed by the substrate is reduced as the substrate preheating temperature increases. An increase in substrate thickness delays heat transfer from the molten cladding to the belt, raising thermal resistance. These insights help optimize processing parameters for high-quality bimetallic strip production in HSBC.</p>