Please join us in thanking all those scientists and experts in the various fields represented in Transport in Porous Media for devoting time and effort to review the papers that we have been sending them. The Editor-in-Chief and Publisher acknowledege the colleagues listed below for their excellent reviews of papers for which final decisions have been made during the period January 2021–December 2021.

Ali Abedini

Ahmad Abushaikha

Lateef Akanji

I. Yucel Akkutlu

Adnan Al Hinai

Edin Alagic

Gianluca Alaimo

Abdellah Alem

Hussein Alihussein

Zineddine Alloui

Bjarne Almqvist

Moh'd A. Al-Nimr

Riyadh Al-Raoush

Vladimir Alvarado

Nayef Alyafei

Pål Andersen

Ryan Anderson

Pedro Anjos

Ryan Armstrong

Christoph Arns

Hamed Aslannejad

Meysam Atashafrooz

Denis Aubry

J. L. Auriault

Orhan Aydin

Jalel Azaiez

Boris Baeumer

Baojun Bai

Paul Baker

Bruce J. Balcom

Toshiyuki Bandai

Reza Barati Ghahfarokhi

Maria Claudia Barbosa

Murat Barisik

Antonio Barletta

Morteza Bayareh

Bita Bayestehparvin

Alberto Bellin

Alberto Beltrán

David Benson

S. M. Benson

Steffen Berg

Tadikonda Venkata Bharat

Somnath Bhattacharyya

Siddhartha Biswas

Jose Blasco

G. V. Bognar

Yu Boming

Alexander Bond

Fabio Bordeaux Rego

A. Bru

B. Buffel

Tom Bultreys

Lourdes Cabral

Mauro Cacace

Jianchao Cai

Dan Calugaru

Pavel Capek

Luigi Capozzi

Jean-Philippe Carlier

Adrian Cerepi

Robert Cerny

Ali Chamkha

Bo Chen

Guangjing Chen

Jui-Sheng Chen

Yuexia Chen

Jinhyun Choo

Ivan Christov

Constantinos Chrysikopoulos

Marcin Chwała

Faruk Civan

Francis Claret

Benoît Cochepin

Sarah Codd

Andrea Cortis

Philippe Coussot

Fabrizio Croccolo

Luis Cueto-Felgueroso

Jingyuan Cui

Nihad Daidzic

Hugh Daigle

Hassan Dashtian

Maria Datcheva

Catherine A. Davy

Richard. Dawe

Felipe de Barros

Tomas De Campos Aquino

Daan Willem de Kort

Marco De Lucia

Gerrit de Rooij

Yacine Debbabi

Frederick Delay

Fernando Delgado Ramos

Aronne Dell'Oca

Mojdeh Delshad

Gemmina Di Emidio

Vittorio Di Federico

David DiCarlo

Andrea Dominijianni

Mingzhe Dong

Shashvat Doorwar

Florian Doster

Maria Dragila

Ishai Dror

Yujing Du

Jens Eller

M. A. Eltaher

Ayoob Entezari

Rita Esposito

Magdy Ezzat

Jintu Fan

S. Mobeen Fatemi

Ruimin Feng

James Fink

Aldo Fiori

Thomas Fogwell

Masoud Forsat

Liyun Fu

Maximilian Gaedtke

Deepen Gala

Julia Gale

Patrick Gane

Xin Gao

Ying Gao

Alvaro Garcia

Gaetano Garfi

Charlotte Garing

Sarah Gasda

Jun Ge

L. W. Gelhar

Kirill Gerke

Muhammad Gibrata

Alex Gigliotti

Mauro Giudici

Paul Glover

Fabrice Golfier

Jeff Gostick

Philippe Gouze

Benoît Goyeau

Arne Graue

Andreas Griesser

Ian Griffiths

Bo Guo

Hal Gurgenci

Teklu Hadgu

Hadi Hajibeygi

Claude Hammecker

Karl Hammond

Michael Hannon, Jr.

Scott Hansen

Mohamed Hayek

Jun He

Juan J. Hidalgo

Silvia Hirata

Ran Holtzman

Kamel Hooman

Shaobin Hu

Yayuan Hu

Haiying Huang

Zaoqin Huang

Christian Huber

Timothy Hunter

P. E. G. Idahosa

Mohsen Jabbari

Samuel Jackson

Arne Jacob

D. Jacques

Lesley James

Igor Jankovic

Farzam Javadpour

Xiaoyun Jiang

Lu Jin

Yan Jin

Honggeun Jo

Michael Johns

Amir Jourak

Yang Ju

Peter Kang

Taniya Kar

Theodoros Karalis

Nader Karimi

Zuleima Karpyn

Emmanuel Keita

James F. Kelly

Ali Keshavarz

Arzhang Khalili

Hasan Khan

Jamal Khatib

Shigeo Kimura

Timo Koch

Georg Kosakowski

Manfred Krafczyk

Samuel Krevor

Kundan Kumar

Lary Lake

Jaime Lazaro Nebreda

Tanguy Le Borgne

Allan Leal

Seung Jae Lee

Peter Lehmann

Alessandro Lenci

Daniel Lester

Juliana Leung

Jolanta Lewandowska

Chenfeng Li

Huazhou Li

Lin Li

Qi Li

Tingshuai Li

Yong Li

Zhiping Li

Zhitao Li

Tobias Licha

Qingyang Lin

Xueyu Lin

Niklas Linde

D. S. Lipson

Guodong Liu

Fawang Liu

Lei Liu

Leilei Liu

Lijun Liu

Tongjing Liu

Xu Liu

Yongzan Liu

Yuewu Liu

Anna-Lena Ljung

Sandro Longo

Giulio Lorenzini

Xuanqing Lou

Ning Lu

Tianjian Lu

Manfred Luecke

Dariusz Lydzba

Urs K. Mäder

Julien Maes

Daulet Magzymov

Hassan Mahani

Mohd Fadhil Majnis

Mahmoud Mamou

Dan Marchesin

Manuel Marcoux

Daniel Markl

Stephan K. Matthai

G. Peter Matthews

James McClure

Cathy McNamee

Mohamed Mehana

Yashar Mehmani

Ayaz Mehmani

Eckhart Meiburg

Yanjun Meng

Hannah Menke

Vivian Merk

Filippo Miele

Abouzar Mirzaei-Paiaman

Jonathan Mitchell

Vladimir Mityushev

Leili Moghadasi

K. K. Mohanty

Abdelkader Mojtabi

Sergi Molins

Md. Mamun Molla

Luis Montenegro Perez

Rouhollah Moosavi

Herve Morvan

Peyman Mostaghimi

Marcel Moura

Valeri Mourzenko

Mohaddeseh Mousavi Nezhad

Maruti Mudunuru

Sumit Mukhopadhyay

Muhammad Muniruzzaman

Adrian Muntean

Tongchao Nan

Mohsen Nazari

Insa Neuweiler

X. P. Nguyen

Duc Nguyen Dinh

Vahid Niasar

Victor Nikolaevskiy

Jan Nordbotten

Mira Olson

Shlomo Orr

Mufutau Oyeneyin

Sibel Pamukcu

Feng Pan

Gang Pang

Palash Panja

William Pao

Soo-Jin Park

J. Y. Parlange

Tad Patzek

Hao Peng

Shoujian Peng

Xiaolong Peng

Jean-Michel Pereira

Malgorzata Peszynska

Jyoti Phirani

Piotr Pieczywek

Michelle Plampin

Ioan Pop

Torben Prill

Prakash Purswani

Alexandre Puyguiraud

Chongchong Qi

Haitao Qi

Chao-Zhong Qin

Mohammad Mahfujur Rahman

G. Raja Sekhar

T. Ramakrishnan

Muhammad Ramzan

Amir Raoof

Nadja Ray

B. V. K. Reddy

D. Andrew S. Rees

Francois Renard

Amir Riaz

Alírio Egídio Rodrigues

Amauri Rosenthal

Delphine Roubinet

Maja Rücker

Mozhdeh Sajjadi

Subharthi Sarkar

Emilie Sauret

Tom Schanz

Josephina Schembre-McCabe

Ben Schweizer

Andy Sederman

Holger Seher

Anwar Shahid

Jianfu Shao

Mohan D. Sharma

Mikhail Sheremet

Igor Shevchuk

Nima Shokri

Kamaljit Singh

Josep Soler

Wenhui Song

Yi-Qiao Song

Wen Song

Siegfried Stapf

Peter Stein

Mathias Steiner

Peter Stewart

Howard Stone

Hao Sun

Yongle Sun

Zhuang Sun

Anna Suzuki

Yaghoub Tadi Beni

Bharat Tadikonda

Folkert M. Tangerman

Shu Tao

Alexandre Tartakovsky

Arthur Thompson

Jean-François Thovert

Fuqiang Tian

Yuan Tian

Davood Toghraie

Pavel Tomin

Frederic Topin

Carlos Torres-Verdin

Jawali Umavathi

Evren Unsal

Marios Valavanides

Francisco Valdes-Parada

Mohammad Sadegh Valipour

S. Valliappan

Matthieu Vandamme

J. Vanderborght

B. M. Vernescu

Jan Vinogradov

N. Vishnu Ganesh

Bin Wang

Chen Wang

Chu Wang

Gongbo Wang

Ke Wang

Moran Wang

Ningyu Wang

Yan Wang

Jerome Wassermann

Rodrigo Weber dos Santos

Zhang Wen

Jacques Wendling

Brian Wood

Zhaohui Xia

Boqi Xiao

Jiang Xu

Ke Xu

Peng Xu

Rui Xu

Liang Xue

Xiaofan Yang

Jun Yao

Y. C. Yortsos

Hong-Hui Yu

Yue Yu

Cun Zhang

Hao Zhang

Xiaolei Zhang

Benzhong Zhao

Jianlin Zhao

Jiayi Zheng

Yinbo Zhou

Renjie Zhou

Yingfang Zhou

Zhaopeng Zhu

We apologize for any errors or inadvertent omissions.