đối lưu

Definition

Noun:
- Convection: The primary scientific meaning refers to the movement within a fluid (liquid or gas) caused by the tendency of hotter, less dense material to rise and colder, denser material to sink, transferring heat in the process.
Noun (extended usage):
- Exchange (of goods): In economic or logistical contexts, it can refer to the reciprocal exchange or circulation of commodities.

Usage Examples

Noun (Scientific):
- Sự đối lưu không khí ảnh hưởng đến thời tiết. (Air convection affects the weather.)
- Nồi nước sôi minh họa hiện tượng đối lưu nhiệt. (A boiling pot of water illustrates the phenomenon of thermal convection.)
Noun (Economic):
- Hai công ty thỏa thuận đối lưu hàng hóa. (The two companies agreed on an exchange of goods.)

Advanced Usage

"đối lưu nhiệt": Thermal convection. This is the standard compound term for the heat transfer process.
- Đối lưu nhiệt là một trong ba cơ chế truyền nhiệt. (Thermal convection is one of the three heat transfer mechanisms.)
"đỉnh đối lưu": Tropopause (in meteorology). The boundary in the Earth's atmosphere between the troposphere and the stratosphere, marking the limit of most convection.
- Đỉnh đối lưu thường cao hơn ở vùng xích đạo. (The tropopause is usually higher over the equator.)

Variants and Related Words

Đối lưu quy mô lớn (n): Large-scale convection, often used in meteorology or oceanography.
Dòng đối lưu (n): Convection current.
- Dòng đối lưu trong lò nung làm nóng đều. (The convection current in the furnace heats evenly.)

Synonyms

Convection: The circulatory movement in fluids.
Circulation: Movement to and fro or around something, especially that of fluid.
Exchange: The act of giving one thing and receiving another.

Related Scientific Terms

Dẫn nhiệt (Conduction): Heat transfer through direct contact.
Bức xạ nhiệt (Radiation): Heat transfer via electromagnetic waves.
Đối lưu cưỡng bức (Forced convection): Convection aided by external means like a fan or pump.