Thermal ablation is atreatment modality for liver cancer that utilizes heat to destroy cancerous tissues. The numerical analysis of thermal ablation processes in liver tissue was studied using two different methods: microwave ablation (MWA) and radiofrequency ablation (RFA). The effectiveness of both methods and the thermal characteristics of tumor ablation, including temperature distribution, temporal variation intemperature, volume of ablation, and destruction of cancerous tissue, were investigated. MWA requires less time for complete ablation than RFA and can generate larger ablation zones. Additionally, a novel electrode-based design for RFA, we call it Norfolk pine electrode (NPE), which focuses on ablating large and spherical tumors, has been proposed and analyzed. To the best of our knowledge, the conventional RFA designs, which utilize the Christmas tree electrode and umbrella electrode, are effective in ablating tumors smaller than 3 cm . However, they fail to completely eradicatespherical tumors. Interestingly, our proposed NPE claims the ability to fully ablate spherical tumors, even those larger than 3 cm . This NPE could be a promising and practical advancement in the realm of tumor treatment.