I use @VaadinSessionScope how to clean the session that not close browser

I want to clean the session for renew the object that the scope is VaadinSessionScopoe while log out , but not close the browser ,if I use component.getCurrent.getSession.close() ,is this work?

how can I use the session method to remove the session so the Componnet annotate with @VaadinSessionScopoe can rebuild a new Object

plus:when I log out The UI and log In again then new a Object;