This issue of Transport in Porous Media is dedicated in honour of Dr. Don Nield who has recently retired after many years of service on the Editorial Board. He is an emeritus professor at the University of Auckland. He is internationally renowned as an expert on convection in porous media: his authoritative book on the subject, Nield and Bejan “Convection in Porous Media” was last updated in 2017.

Don has reviewed thousands of manuscripts for Transport in Porous Media, tirelessly giving his time and expertise to improve the quality of the journal and the paper he received. He is always prompt and to the point in his feedback. His energy and commitment will be missed.

We wish him all the best in his much-deserved retirement.

Editor-in-Chief

Martin Blunt