Yes, you could take advantage of our API call to bucketVisitor, here.
After this you could refresh the page (redirect to the same page). The code would look something like this:
window['optimizely'] = window['optimizely'] || ; window['optimizely'].push(["bucketVisitor", experiment_id, variation_id]); var currentLocation = window.location.href; window.location.href = currentLocation;
I hope that helps you!