4results about "Diffusion analysis" patented technology

The present application relates to the technical field of concrete crack repair, and particularly relates to a visual grouting diffusion device for concrete crack simulation and an application method thereof, which comprises an experimental box, a cover plate, pumping pipes in communication with the interior of the experimental box, an upper-layer crack sample and a lower-layer crack sample in the experimental box, a down-stroke cylinder on the outer wall of the cover plate, the output end of the down-stroke cylinder movably penetrating through the cover plate and being connected with the upper-layer crack sample, and a plurality of adjusting assemblies on the cover plate for adjusting the inclination angle of the upper-layer crack sample. The present application has the following advantages: the output end of the down-stroke cylinder is connected with the upper surface of the upper-layer crack sample, so that the upper-layer crack sample can be used together with the plurality of adjusting assemblies, the crack sample is moved by the output of the cylinder, the inclination adjustment of the upper-layer crack sample at multiple angles is smoothly realized, and finally the parameters of the crack sample after adjustment are detected by the auxiliary detection device, so that diversified simulation grouting experiments are realized.

The application discloses a shale single-component gas diffusion coefficient testing device and a testing method, and specifically comprises a thermostat, an injection module, an adjusting module and a monitoring module, wherein the thermostat is internally provided with a testing module; the testing module comprises a core holder, an upstream chamber connected with the upstream of the core holder and a downstream chamber connected with the downstream of the core holder; the injection module injects gas into the upstream chamber and the downstream chamber; the adjusting module is used for adjusting the pressure of the upstream chamber and the downstream chamber; and the monitoring module is used for monitoring the pressure of the upstream and downstream of the core holder, the upstream chamber and the downstream chamber; the application adopts the bulk phase subtraction method and the Darcy formula to calculate the total flow and the Darcy flow under the near-equilibrium condition, obtains the convection flow and the diffusion flow result, realizes the testing of the shale diffusion flow under the single-component gas condition, the result is more in line with the seepage mechanics assumption condition, and the accuracy of the diffusion coefficient calculation can be ensured.

The application provides a method, an apparatus and a device for evaluating a dynamic diffusion of natural hydrogen in rock pores. The method includes: performing, at a target pressure and a target temperature, a simulation calculation of a natural hydrogen adsorption based on a pre-constructed pore model of a rock to be evaluated, and determining an average number of hydrogen molecules adsorbed in the rock pores when the natural hydrogen is saturated at the target pressure and the target temperature; determining a natural hydrogen content, based on lithologic parameters, the average number of hydrogen molecules, the target pressure and the target temperature; adding one or more preset gases to the pre-constructed pore model, determining a loss content of the natural hydrogen, and determining a diffusion coefficient of the natural hydrogen; determining a diffusion evaluation parameter, based on the natural hydrogen content, the loss content and the diffusion coefficient.

Disclosed by the present disclosure is a method for obtaining key parameters for pollutant transportations under coupling effects of temperature and hydrodynamics based on a site scale. The method is to obtain the permeability parameters, thermal conductivity, and dispersion coefficient of the contaminated sites based on multi field coupling numerical simulations of hydrodynamic field-temperature field-concentration field. The transportation parameters for pollutants on the site are key indicators for the investigations and treatments of organic pollution on the site. The method as illustrated in the present disclosure includes establishing a water-thermal-salt coupling model for organic contaminated sites according to site drilling data and site physical test results in the early stage, performing multiple field coupling numerical inversion according to the site model in combination with multi-party data, adjusting the model parameters through manual trial and error method to improve model accuracy and obtaining the optimal model.