[en] Full text: Understanding the physics of particle transport and predicting density profiles in burning plasmas are of significant importance. Density peaking has been observed in many tokamaks and it indicates existence of an inward pinch, whose amplitude is usually larger than that of the Ware pinch. Angioni et al. showed that density peaking decreases with increasing collisionality in ASDEX Upgrade and an anomalous inward pinch becomes dominant at low collisionality. In this paper, we study behavior of the plasma and neutrals focused on density peaking and a resultant momentum pinch when we artificially provide a turbulence-induced inward pinch velocity and diffusivity with arbitrary amplitudes, by using one-dimensional multi-fluid transport code, TASK/TX. The TASK/TX code simultaneously solves the continuity equations and the equations of motion for electrons and ions coupled with Maxwell's equations and simple neutral transport equations, and the profiles such as the densities, the radial electric field and the rotations are self-consistently determined. Since there are no explicit pinch and diffusion terms in the continuity equation, in the TASK/TX code the turbulent particle pinch and diffusion are described through the momentum exchange between electrons and ions. A model describing the inward pinch through the momentum exchange was newly developed to study the effect of the inward pinch velocity on the density profiles. An additive anomalous inward pinch term in the equations of motion clearly produces density peaking associated with the change in the poloidal and toroidal rotations. However, our simulations showed that due to the ionization source by small but finite thermal neutrals in the core the centrally-peaked density profile can be formed as if the finite inward pinch existed, although in this case turbulence induces outward pinch and the additive inward pinch term is off. It implies that behavior of neutrals in the core should be carefully taken into account when inward pinch is evaluated based on experimental observation. (author)