Experiments were performed with Test-section of LLCB TBM on NaK. Test-section made of stainless steel (SS) included inlet pipe, inlet collector of rectangular cross section, two rows of parallel poloidal (vertical) ducts and outer collector with outlet pipe. Numerical simulation has been carried out using MHD module of FLUENT. Various flow properties like side wall electric potential distribution, pressure and velocity distribution has been compared with measured values.