id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
alkej-408	Shehab, Saad Najeeb	ظاهرة الحمل الطبيعي من أنبوب عمودي مسخن مزعنف: تحليل تجريبي	2019	11	.pdf	application/pdf	4209	185	49	It's also can be calculated from Newton’s equation of cooling as follows [10, 11]: ����� = ℎ�� ��(���� − ��) … (6) The average natural-convection heat transfer coefficient (hav) can be calculated as: ℎ�� = � � � � − ���� ��(���� − ��) … (7) The percentage error (e%) is evaluted as the percentage relative of absolute error (eab) to experimental value (Vexp): F% = F�H�I$J K 100 = L�I$J − �����I$J L K 100 … (15) where, the absolute error (eab) is the absolute difference between experimental value (Vexp) and correlated value (Vcor) as follows: F�H = M�I$J − ����M … (16)	cache/alkej-408.pdf	txt/alkej-408.txt