A Numerical Investigation of an Artificially Roughened Solar Air Heater oleh Anil Singh Yadav, Tabish Alam, Gaurav Gupta, Rajiv Saxena, Naveen Kumar Gupta, K. Viswanath Allamraju, Rahul Kumar, Neeraj Sharma, Abhishek Sharma, Utkarsh Pandey, Yogesh Agrawal