@article{202106.0660, doi = {}, url = {https://doi.org/}, year = 2021, month = {June}, publisher = {Preprints}, author = {Marcin Łęcki and Dariusz Andrzejewski and Artur Gutkowski and Grzegorz Gorecki}, title = {Study of the Influence of the Lack of Contact in Plate and Fin and Tube Heat Exchanger on Heat Transfer Efficiency under Periodic Flow Conditions}, journal = {Preprints} }