Choked flow is a fluid dynamic condition associated with the Venturi effect. When a flowing fluid at a given pressure and temperature passes through a restriction (such as the throat of a convergent-divergent nozzle or a valve in a pipe) into a lower pressure environment the fluid velocity increases.
Red wine varietals that tend to benefit from a good bit of oak include: Pinot Noir, Cabernet Sauvignon, Merlot, Pinotage, Chianti, Zinfandel, Nebbiolo, Tempranillo and Syrah. White wine varietals that are receptive to oakâs influence include: Pinot Grigio, Pinot Blanc, Sauvignon Blanc, Semillon and of course Chardonnay.
Wines from different years are aged and blended using a solera system before bottling, so that bottles of sherry will not usually carry a specific vintage year and can contain a small proportion of very old wine. Sherry is regarded by many wine writers as underappreciated and a neglected wine treasure. Oloroso ('scented' in Spanish) is a variety of sherry aged oxidatively for a longer time than a Fino or Amontillado, producing a darker and richer wine. 2  With alcohol levels between 18 and 20%, Olorosos are the most alcoholic sherries.