Study on the Imbibition Behavior of Unsaturated Fractured Sandstone and the Formation Mechanism of "Airshell" under a Temperature Gradient

Database Information Description: File 1: The original neutron imaging data of the spontaneous imbibition process at various moments under different temperature conditions. File 2: The raw data for processing Figures 4, 5, 6, 11, 15, and 16.