• Parametric sensitivity and runaway control emerge as the dominant pattern, with analytical and asymptotic methods delineating stable versus runaway operation for highly exothermic tubular reactors across finite activation energies and varying inlet temperatures, illustrating a unified risk-parameter framework across multiple studies [1], [20], [16], [11].

• Dimensionless analysis and aquifer energy storage studies provide a unifying framework for assessing thermohydraulic behavior in porous media and confined aquifers, enabling rapid screening via dimensionless groups before detailed simulations [2], [5], [3].

• Two-phase heat transfer phenomena and modeling in reactor-related devices converge on integrated flow-thermohydraulic design tools, evidenced by spacer-grid film boiling data, three-dimensional two-fluid steam-generator modeling, and generalized CHF correlations [8], [7], [4], [15].

• Safety-oriented thermal-hydraulic design and monitoring appear as a distinct strand, including passive safety concepts for reactors and techniques for monitoring moderator temperature coefficients via noise analysis [19], [17].

• Advanced cooling configurations and stability analyses in tubular and channel geometries reveal a pattern of cooling innovations and stability assessments, such as tube-wall reactors cooled by annular heat pipes and instability analyses in parallel boiling channels [9], [6].