PIV-23

Table 2-23. Velocity profiles.

Ethanol evaporated without burning in boundary layer behind back-facing step.
Wind channel had no top lid, U₀ =11,2 m/s,
distance from barrier x = 40 mm.

x, y (mm) - longitudinal and transverse coordinates;
U, U', V, V', (m/s) - longitudinal averaged velocity and its RMS pulsations,
temperature (T, K), correlations U'V' (m ²/s ²);

Tu₀=1%
y,mm	T	U	V	U'	V'	U'V'
0	---
0,5	---	1,511	-0,031	0,944	0,236	0,005
1	---	3,032	-0,089	2,062	0,688	0,154
1,5	---	4,549	-0,183	2,577	1,063	0,639
2	---	5,958	-0,281	2,623	1,216	1,009
2,5	---	7,058	-0,345	2,662	1,256	1,232
3	---	7,933	-0,382	2,670	1,260	1,315
3,5	---	8,692	-0,409	2,563	1,251	1,292
4	---	9,347	-0,425	2,281	1,106	0,907
4,5	---	9,909	-0,422	1,931	0,954	0,582
5	---	10,363	-0,404	1,550	0,878	0,350
5,5	---	10,695	-0,374	1,266	0,771	0,204
6	---	10,934	-0,339	1,145	0,595	0,101
6,5	---	11,107	-0,308	0,829	0,480	0,078
7	---	11,219	-0,288	0,449	0,410	0,034
7,5	---	11,280	-0,281	0,329	0,343	0,013
8	---	11,313	-0,283	0,308	0,311	0,004
8,5	---	11,332	-0,284	0,286	0,287	-0,002
9	---	11,336	-0,283	0,255	0,266	0,000
9,5	---	11,341	-0,277	0,233	0,264	0,001
10	---	11,346	-0,273	0,228	0,258	-0,005
10,5	290	11,346	-0,273	0,225	0,265	-0,011
11	290	11,351	-0,275	0,214	0,250	-0,012
11,5	290	11,360	-0,274	0,208	0,234	-0,009
12	290	11,369	-0,269	0,204	0,226	-0,007
12,5	290	11,383	-0,261	0,201	0,235	-0,007
13	290	11,393	-0,256	0,200	0,239	-0,011
13,5	290	11,397	-0,261	0,196	0,223	-0,011
14	290	11,397	-0,269	0,199	0,220	-0,013
14,5	290	11,393	-0,275	0,202	0,224	-0,013
15	290	11,393	-0,274	0,188	0,228	-0,007
15,5	290	11,393	-0,267	0,185	0,253	-0,007
16	290	11,397	-0,256	0,196	0,242	-0,012
16,5	290	11,393	-0,246	0,179	0,236	-0,009
17	290	11,388	-0,236	0,176	0,231	-0,008
17,5	290	11,383	-0,228	0,188	0,244	-0,012
18	290	11,383	-0,219	0,203	0,255	-0,012
18,5	290	11,379	-0,210	0,204	0,266	-0,011
19	290	11,379	-0,205	0,223	0,277	-0,009
19,5	290	11,369	-0,204	0,233	0,293	-0,002
20	290	11,360	-0,205	0,244	0,273	0,004

Presence of areas with abnormally high and null friction corresponds to the boundary layer with detachment and large-scale structures formed at the barrier flow.

x, y (mm) - longitudinal and transverse coordinates; U, U', V, V', (m/s) - longitudinal averaged velocity and its RMS pulsations, temperature (T, K), correlations U'V' (m 2/s 2);

Presence of areas with abnormally high and null friction corresponds to the boundary layer with detachment and large-scale structures formed at the barrier flow.

x, y (mm) - longitudinal and transverse coordinates;
U, U', V, V', (m/s) - longitudinal averaged velocity and its RMS pulsations,
temperature (T, K), correlations U'V' (m ²/s ²);