Abstract A vertical annular configuration with differently heated cylindrical surfaces and horizontal adiabatic boundaries is systematically studied in view to their industrial applications. In this paper. we investigate the effects of conjugate buoyant heat transport in water based nanofluids with different nanoparticles such as alumina. titania or copper. https://www.parisnaturalfoodes.shop/product-category/max-protection-deodorant-dusk/