Kidney stones, mineral and salt deposits that can obstruct the urinary tract and impede urine flow, cause significant discomfort and pain to affected individuals. Surgical techniques are commonly employed to break down large stones into smaller ones, making the resulting fragments easier to remove by urine flow. However, the precise optimal size that maximizes stone clearance, reduces intervention times, and ensures effective treatment is still unclear. To determine this critical dimension, it is crucial to comprehend the forces involved in stone motion and transportation within the renal pelvis. The clinical scenario studied in the current work involved a patient resting on a hospital bed after undergoing a procedure for renal calculi ablation.