How to move formula to next line in TexStudio?

Question

TeX

Here is my code:

\begin{equation}
   	\begin{split}
   		\begin{aligned}
   			\frac{\partial v_{i,n}}{\partial t}+\lambda_{3-i}\frac{\partial v_{i,n}}{\partial x}=\frac{1}{\sqrt{\Delta}}\left(\frac{\partial\lambda_{i}}{\partial t}+\lambda_{3-i}\frac{\partial\lambda_{i}}{\partial x}\right)\left(v_{2,n}-v_{1,n}\right)\\
   			&+\tilde{f}_{n}
   		\end{aligned}
   	\end{split}
   \end{equation}

But the formula doesn't translate correctly.