Plane problem of thermogravitational convection in a closed rectangular cavity is numerically solved in conditions of radiant energy supply to the one of the boundaries. Differential heat transfer parameters (fields of temperatures and stream functions) for the conjugate (only vertical walls. only horizontal. vertical and horizontal walls) and the nonconjugate formulation are obtained. https://countryscenesaddleryandpetsuppliers.shop/product-category/western-saddle-pad/