This special section of JFE is dedicated to Dr. Sankaraiyer Gopalakrishnan who unexpectedly passed away recently. Gopal, as we affectionately called him, served the Fluids Engineering Division and ASME with great distinction over many years in various capacities. We appreciate his commitment and service even more considering Gopal's responsibilities as Vice President of Flowserve Corporation in California. He was an uplifting force in moving the Division forward. His wise counsel and guidance will be missed by all who grew accustomed to his presence at the meetings of the Division. He was a dignified gentleman, a deeply caring human being, and a dear friend. Our deepest sympathies are with his family. We miss him and we wish him well in his journey beyond.