Engineering Physics Annotation << Back Model of Heat Conductivity of Nanoliquid Between Different-Temperature Planes With a Still Medium Ryazhskikh A.V. The problems for nanofl uid in a fl at horizontal channel under boundary conditions of the fi rst kind without motion are investigated. An analytical solution is obtained using the integral Laplace transform. A formula is given for calculating the thermal conductivity of the nanofluid depending on the thermal conductivities of the base fl uid and nanoparticles. A computational experiment conducted for the Al2 O3 /H2 O nanofluid showed the adequacy of this approach. Keywords: nanofl uid, thermal conductivity, fl at channel, boundary conditions of the first kind. DOI: 10.25791/infi zik.1.2025.1454 Pp. 36-40.