Because the burning of the oven will generate a lot of heat, the temperature is much higher than that in other outdoor places, and the heat can be conducted, so it will conduct heat upwards. Because the oven is open-air, a lot of heat escapes upward, generating airflow and blowing all the smoke.

Solution:

Use a fan to suck the smoke away. Place the fan next to the oven, with the back of the fan facing the oven and the front of the fan facing the direction of the smoke you want.