PREFACE: ILASS 2020 SPECIAL ISSUE

A series of regional Institute for Liquid Atomization and Spray Systems (ILASS) conferences are held annually and focus on recent advances in experimental, computational, and theoretical analysis of the break-up process of liquids.The contributions cover a diverse range of fields including combustion systems, agricultural applications, fire suppression, and industrial processing sprays.The 2020 ILASS-Americas conference was scheduled to be held in May of 2020 in Madison, WI.However, the conference was canceled due to the coronavirus disease (COVID-19) pandemic; therefore, papers submitted to ILASS-Americas 2020 were unable to be published in the conference proceedings and were not disseminated to the scientific community.In a partnership with Atomization & Sprays (the journal associated with ILASS) and Begell House, we are pleased to offer these special issues of Atomization & Sprays, which collect journal papers based on conference submissions.ILASS-Americas 2020 authors were invited to submit to Atomization & Sprays manuscripts that expanded on the papers submitted to the conference.The papers