This invention provides a method for calculating segmented discontinuous solar
radiation temperature gradients in enclosed stacked aqueducts, relating to the field of
aqueduct technology. The method divides the inner cavity of the enclosed stacked
aqueduct into a gas-phase coupled
heat transfer zone, a gas-
liquid phase interface zone, and a fluid heat source anchoring zone based on
water level height, constructing a thermo-
solid coupled
heat transfer model that distinguishes the properties of the media. Through this partitioning, the heat exchange characteristics of different regions can be accurately matched, establishing a segmented discontinuous solar
radiation temperature gradient kernel function along the height coordinate. Based on the thermo-
solid coupled
heat transfer model that distinguishes the properties of the media, the discontinuous solar
radiation temperature gradient kernel function is used as a boundary driving source, substituted into the transient nonlinear heat conduction
partial differential equation for iterative solution, outputting a discontinuous solar
radiation temperature gradient curve containing abrupt step characteristics at the water surface line. This method solves the problem of inaccurate calculation of solar
radiation temperature gradients in enclosed stacked aqueducts and is applicable to the calculation of solar
radiation temperature gradients in enclosed stacked aqueducts.