We study the local exact
controllability problem for the Navier-Stokes equations
that describe an incompressible fluid flow in a bounded domain
Ω with control distributed in a subdomain $\omega\subset\Omega\subset \mathbb{R}^n, n\in\{2,3\}$.
The result that we obtained in this paper is
as follows. Suppose that $\hat v(t,x)$ is a given
solution of the
Navier-Stokes equations. Let $ v_0(x)$
be a given initial condition
and $\Vert \hat v(0,\cdot) - v_0 \Vert < \varepsilon$
where ε is small enough. Then there
exists a locally distributed control $u,
\text{supp}\, u\subset (0,T)\times \omega
$ such that the solution v(t,x) of
the Navier-Stokes equations:
$$
\partial_tv-\Delta v+(v,\nabla)v=\nabla p+u+f,
\,\, \text{\rm div}\, v=0,\,\, v\vert_{\partial\Omega}=0,
\,\, v \vert_{t=0} = v_0
$$
coincides with $\hat v(t,x)$ at the instant T : $v(T,x) \equiv \hat v(T,x)$.