Discrete vessel heat transfer in perfused tissue--model comparison

Area of Science:

• Biomedical Engineering
• Computational Biology
• Thermodynamics

Background:

• Accurate modeling of heat transfer in perfused biological tissue is crucial for understanding physiological processes and developing therapeutic interventions.
• Existing methods for calculating heat transfer in tissues with discrete vasculature vary in complexity and computational demand.

Purpose of the Study:

• To compare two distinct methods for calculating heat transfer in perfused biological tissue using a discrete vessel description.
• To evaluate the accuracy and efficiency of a newly proposed 2D method against a more complex 3D method.

Main Methods:

• Description and comparison of two methods: a previously established 3D model and a novel 2D model.
• Analysis of differences in vascular system representation and heat flux calculation algorithms.
• Simulation-based comparison of results from both methods, focusing on countercurrent blood vessel systems.

Main Results:

• The simpler, computationally less intensive 2D method demonstrated a good ability to replicate key features of the more complex 3D method's solution.
• Observed discrepancies between the two methods were explicable on physical grounds.
• The 2D method proved effective for specific 2D problems involving countercurrent blood vessel systems.

Conclusions:

• The proposed 2D method offers a viable and computationally efficient alternative for specific heat transfer calculations in biological tissues.
• The study validates the physical basis of the simpler model and highlights its potential for clinical applications.
• Further investigation into the limitations and applicability of the 2D method is warranted.